Service instructions

Service instructions

MX eco 4V
MX pro 4V
MX pro 6V
MX multi-eco
MX multi-pro

General remarks

The following symbols should assist you in handling the instructions:

Advice, tip !

General information, note exactly !

The requirements for successful commissioning are correct selection of the device, proper planning and installation. If you have
any further questions, please contact the supplier of the device.

Capacitor discharge !
Before performing any work on or in the device, disconnect it from the mains and wait at least 15 minutes until the capacitors have
been fully discharged to ensure that there is no voltage on the device.

Automatic restart !
With certain parameter settings it may happen that the frequency inverter restarts automatically when the mains supply returns
after a power failure. Make sure that in this case neither persons nor equipment is in danger.

Commissioning and service !
Work on or in the device must be done only by duly qualified staff and in full compliance with the appropriate instructions and
pertinent regulations. In case of a fault contacts which are normally potential-free and/or PCBs may carry dangerous voltages. To
avoid any risk to humans, obey the regulations concerning "Work on Live Equipment" explicitly.

Terms of delivery
The latest edition "General Terms of Delivery of the Austrian Electrical and Electronics Industry Association" form the basis of our
deliveries and services.

Specifications in this document
We are always anxious to improve our products and adapt them to the latest state of the art. Therefore, we reserve the right to
modify the specifications given in this document at any time, particular those referring to weights and dimensions. All planning
recommendations and connection examples are non-binding suggestions for which we cannot assume liability, particularly
because the regulations to be complied depend on the type and place of installation and on the use of the devices.
All foreign-language translations result from the German or English version. Please consider those in case of unclarity.

Basis of contract
The specifications in text and drawings of this document are no subject of contract in the legal sense without explicit confirmation.

Regulations
The user is responsible to ensure that the device and its components are used in compliance with the applicable regulations. It is
not permitted to use these devices in residential environments without special measures to suppress radio frequency
interferences.

Trademark rights
Please note that we do not guarantee that the connections, devices and processes described herein are free from patent or
trademark rights of third parties.

Copyright
Layout, equipment, logos, texts, diagrams and pictures of this document are copyrighted. All rights are reserved.

Service of frequency inverters
>pDRIVE< MX eco & pro

0.75...630 kW, 3 AC 380...480 V; 2.2...800 kW, 3 AC 500...690 V

Parameters and their settings refer to software version APSeco_B04_05 or APSpro_B04_05

Theme Page Theme Page

General ...................................................................... 2 Defects of the display........................................................43
Identification of the device ................................................. 3 Other malfunctions ............................................................44
Storage ............................................................................... 3 Hardware diagnostics ..............................................50
Environmental influences.................................................... 4 Overview of the components ............................................50
Application remarks............................................................ 5 Diagnostic LEDs ................................................................50
Factory setting .................................................................... 6 Fuses .................................................................................56
Motor data .......................................................................... 7 Checking the current transformers ...................................60
Overview of types ............................................................... 9 Insulation measurement ....................................................62
Maintenance ............................................................ 10 Voltage levels.....................................................................62
HTSI

Visual inspection............................................................... 10 Measuring points for the DC link voltage ..........................63
Cleaning the heat sink ...................................................... 10 Software concept.....................................................64
Cooling air holes and filter mats....................................... 10 Spare part concept ..................................................65
Maintenance of fans ......................................................... 11 Training concept ......................................................65
Load test ........................................................................... 13
Reference value distributor ......................................66
Troubleshooting....................................................... 14
Summary of limitations ............................................68
8 P01 035 EN.01/01

Diagnostics ....................................................................... 14
Plans.........................................................................69
PC software Matrix 3 ........................................................ 14
Troubleshooting guide...................................................... 20 Warranty Report .....................................................113
Fault memory .................................................................... 21
Trip messages .................................................................. 22

The instructions in hand cover the topics maintenance, diagnostics and trouble shooting.

Use this instructions additionally to the device documentation "Operating instructions", "Description of
functions" and "Mounting instructions".
Details for projecting can be found in the product catalogue.

1

General
Work on live equipment must be done only by duly qualified and trained staff.

Unconditionally pay attention to following points:
• Never touch live parts.
• Only use suitable tools and proper measuring instruments according to the protection classes (I, II, III or
IV).
• Take care of correct work clothes and eye protection.
• Work on live equipment must be done only under attendance of a second skilled person.
• For human protection an insulated, non-grounded mat has to be used.

Please also see the safety directives of EN 50110 "Work on electric installations below 1 kV AC and
1.5 kV DC".

Generally defect units are replaced by exchange devices.

All >pDRIVE< MX eco & pro up to 18.5 kW have a compact power part and therefrom they are typically
replaced as a whole. Exceptions are the Matrix operating panel BE11, option cards used and fans.

HTSI
All >pDRIVE< MX eco & pro from 22 kW are designed in such a way, that service can be done on module level.
For devices from 90 kW an additional tool for removing and fitting (>pDRIVE< "Exchange tool") is supplied,
which is returned after exchange together with the defect inverter.

Please consult our competent service experts in case of severe faults, which cannot be solved by

8 P01 035 EN.01/01
means of this instruction.

Before exchanging defect parts or fuses, the cause of fault must be found. Exchanging parts without
eliminating the cause of fault leads to a new breakdown and may even enlarge the dimension of
damage.

Check as well the ambient conditions before exchanging defect parts or the whole device. See also
chapter "Environmental influences", page 4.

2

Identification of the device
It is important to identify the respective device on the basis of type and serial number in case of maintenance
and repair. These information are required especially when contacting the service department or ordering
spare parts.

There are two possibilities to identify a device:
1. Read off the data on the name plate of the device.
The name plate is always placed on the lower right sight of the housing.
2. Read off the values of parameter F1

These information are absolutely necessary for maintenance and repair:
Type: Name plate or F1.01
Serial no.: Name plate or F1.05
HTSI
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Storage
Storage temperature -25°C to 70°C
In case of storage times up to 3 years no special treatment of the frequency inverter is necessary due to the
comparatively low sharing resistors.
In order to guarantee the life cycle we recommend applying voltage to the inverter for about 1 hour before
pulse enable takes place. This process is also called forming the electrolytic capacitors !!

3

Environmental influences
The frequency inverters >pDRIVE< MX eco & pro provide the following protection degree as standard:

>pDRIVE< MX eco & pro up to 75 kW from 90 kW
Front and sideways IP21 IP31
Top IP41, IP20 without protective cover 4V: IP20, IP31 with DCL box
6V: IP20, IP31 with TRAFO-BOX
Bottom IP21 IP00, IP31 with terminal box

The cooling channel of the power part is separated from the control electronics for all devices and corresponds
with IP54.
If a higher protection degree is desired or required, additional measures have to be taken (e.g. installation in a
cubicle).

The permissible pollution degree of the environment is pollution degree 2 according to EN 61800-5-1 for the
whole power range.
According to EN 60721-3-3 the following applies up to 75 kW Class 3C1 and 3S2
from 90 kW: Class 3C2 and 3S2

Use of frequency inverters in waste water treatment plants

HTSI
Sewage gases may contain ammoniac which cause oxidation of bright copper. In this case, components of the
control and power electronics will corrode and this leads to a malfunction of the device !

Use of frequency inverters in dust polluted environment (e.g. waste incineration plants)
Please be aware of the risk of conductive (metal-)dust and the impact on the inverter electronics. Conductive

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dust causes short circuit of components and thus results in damage.

Use of frequency inverters in the vicinity of crushing plants
Please observe that dust is produced in varying size and consistence in the vicinity of crushing plants (e.g.
shredders). The use of the inverters has to take place in that way, that a contamination with dust is impossible.

Condensation
Generally the operation of the frequency inverter in condensing environment is forbidden. Also condensation
without mains voltage supply causes in interaction with dust (e.g. at chalk-pits) oxidation of copper (even
through solder resist).

Correctives in case of the described environmental influences may be:
• Installation of the frequency inverters aloof from contaminated areas.
• Cooling air for the inverter supplied from a clean area through a separated air flow channel (overpressure
ventilation).
• Appropriate high protection degree of the cubicle (take care of sufficient cooling!).

4

If the frequency inverter is operated outside the specification, warranty claim expires !!!
This applies for example in case of:
• Conductive dust
• Humidity and condensation
• Aggressive atmosphere
• Operation outside the specified temperature range
• Non-compliance with pollution degree 2 according to EN 61800-5-1

Application remarks
The use of the >pDRIVE< MX eco & pro frequency inverters is basically in all mains variants permitted. But
>pDRIVE< MX pro 6V devices must not be operated in "Corner Grounded Networks".

For nongrounded mains (typical for industrial mains) the built-in radio frequency interference filter has
to be adapted by means of switch-over/reconnection. In this case the maximal allowed pulse
frequency is 4 kHz.

Please observe the remarks in chapter "Nongrounded mains" of the corresponding mounting
instructions !
HTSI

Switching between motor and inverter reduces the life cycle of the power part. Therefore the frequency inverter
must be locked with impulse inhibit first and after switching it has to be enabled delayed or set parameter
C6.08 "Motor contactor control" to "1 .. VSD controlled" or "2 .. External control".
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Avoid the use of reversing contactors to change the rotational direction. If avoiding is not possible, at least an
interlock with the inverter has to be provided !

Motors with attached magnetic spring-loaded brake must be supplied externally and not from the inverter
output !

Fans of forced ventilated motors must be supplied externally and not from the motor terminal box !

5

Factory setting
Macros are factory presettings of the parameters for typical applications of the >pDRIVE< MX eco & pro. When
loading a macro, the application data in the EEprom are overwritten. Parameter groups such as motor data,
language setting, fault memory, operating hours, texts and basic communication settings as well as the
parameter settings stored in the "Backup" remain unchanged.
Using parameter B2.02 "Macro selection", the parameter settings according to the selected macro are loaded
into the device memory.

The macro M1 corresponds to the factory setting.

The following parameters are not reset by loading a macro:

Parameter Parameter Parameter
A2.17 Symbol for A2.13 B4.17 Nominal power M2 *) B4.61 EMC constant SM2 *)
A2.18 Unit for A2.13 B4.18 Nominal current M2 *) B4.62 d-axis inductivity SM2 *)
A2.23 Symbol for A2.19 B4.19 Nominal voltage M2 *) B4.63 q-axis inductivity SM2 *)
A2.24 Unit for A2.19 B4.20 Nominal frequency M2 *) B4.64 Stator resistor SM2 *)
B1.01 Select language B4.21 Nominal speed M2 *) C4.37 Process unit
B2.02 Macro selection B4.24 Stator resistor M2 *) C6.24 Symbol pulse counter
B2.03 Parameter mode B4.25 Rotortime constant M2 *) C6.25 Pulse counter unit
B2.04 Create backup B4.26 Fluxing current M2 *) C6.41 Start distancemeasuring

HTSI
B2.05 Restore backup B4.27 Stray reactance M2 *) E3.09 Enable emergency op.
B2.06 Copy parameter set B4.40 Load default motor *) E3.38 Ext. fault 1 name
B2.07 Name parameter set 1 B4.44 Nominal power SM1 *) E3.45 Ext. fault 2 name
B2.08 Name parameter set 2 B4.45 Nominal current SM1 *) E5.04 Copy: MX -> Keypad
B3.16 Inverter power B4.46 Nominal voltage SM1 *) E5.05 Copy: Keypad -> MX

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B3.30 Switch. frequency B4.47 Nominal speed SM1 *) F1.05 Drive serial number
B4.03 Start tuning B4.48 No. of pole pairs SM1 *) F1.06 Facility description
B4.05 Nominal power M1 *) B4.50 EMC constant SM1 *) F1.08 Service notice
B4.06 Nominal current M1 *) B4.51 d-axis inductivity SM1 *) F2.42 Test encoder
B4.07 Nominal voltage M1 *) B4.52 q-axis inductivity SM1 *) F2.45 Simulation mode
B4.08 Nominal frequency M1 *) B4.53 Stator resistor SM1 *) F2.46 Software reset
B4.09 Nominal speed M1 *) B4.55 Nominal power SM2 *) F4.45 IGBT overload time
B4.12 Stator resistor M1 *) B4.56 Nominal current SM2 *) F6.01 Code
B4.13 Rotortime constant M1 *) B4.57 Nominal voltage SM2 *) F6.02 Code value
B4.14 Fluxing current M1 *) B4.58 Nominal speed SM2 *) F6.05 Service code
B4.15 Stray reactance M1 *) B4.59 No. of pole pairs SM2 *)

*) Use parameter B4.40 "Load default motor" if there is a need to reset the motor data to factory setting as
well.

Reset of the fault memory
The whole fault memory can be canceled by entering "7635" in parameter F6.05 Service code. In this way
important information for analysis of faults get lost and thus this function should only be used in exceptional
cases.

Reset of operating hours meters
All operating hours meters can be canceled by entering "1966" in parameter F6.05 Service code. In this way
important information for analysis of faults get lost and thus this function should only be used in exceptional
cases.

In parameter F6.05 Service code only codes described in these instruction may be entered. Otherwise
malfunction and loss of guarantee may occur.

6

Motor data
Each >pDRIVE< MX eco & pro frequency inverter provides factory motor data according to its power.
These motor data are the basis for operating the frequency inverter but usually they are adjusted by entering
the data of the rating plate or they are improved by the determined autotuning data.

When changing a motor parameter the autotuning data get lost. That means that autotuning has to be
executed again after each change of a motor parameter!

Factory motor data M0 IEC table 400 V:

Nominal Nominal Nominal Nominal Nominal Stator Rotor time Fluxing Stray
power voltage current frequency speed resistor constant current reactance
[kW] [V] [A] [Hz] [rpm] [mOhm] [ms] [A] [mH]
B4.29 B4.30 B4.31 B4.32 B4.33 B4.36 B4.37 B4.38 B4.39
0.75 400 2.1 50 1368 2965 44.0 1.63 30.9
1.5 400 3.4 50 1386 1270.5 67.9 2.31 15.3
2.2 400 4.7 50 1400 902.5 84.9 3.03 11.8
3 400 6.1 50 1410 641.5 103 3.73 9.69
4 400 8.5 50 1425 419.5 112 5.52 6.48
5.5 400 11 50 1430 933 134 6.66 5.44
7.5 400 14.8 50 1442 568.5 165 8.87 4.09
HTSI

11 400 21 50 1450 271.8 205 12.1 3.03
15 400 28 50 1455 184.7 239 15.5 2.36
18.5 400 34 50 1464 162.8 307 18.5 1.99
22 400 40 50 1468 116.5 354 21.4 1.72
30 400 53 50 1473 81.7 453 26.8 1.38
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37 400 66 50 1475 55.2 474 34.2 1.08
45 400 79 50 1475 47 497 39.5 0.941
55 400 97 50 1475 31.9 490 49.0 0.758
75 400 130 50 1475 25.8 518 62.9 0.592
90 400 153 50 1480 18.7 687 70.7 0.528
110 400 188 50 1485 15.44 891 88.8 0.420
132 400 230 50 1485 10.68 836 114 0.326
160 400 272 50 1485 6.98 908 127 0.295
200 400 342 50 1486 4.88 952 162 0.230
250 400 427 50 1486 3.61 956 202 0.185
315 400 525 50 1490 2.52 1456 232 0.162
355 400 592 50 1490 2.23 1453 262 0.143
400 400 659 50 1490 1.78 1527 280 0.134
500 400 804 50 1492 1.625 2132 311 0.121
630 400 979 50 1492 1.13 2634 315 0.121

7

Factory motor data M0 IEC table 690 V:

Nominal Nominal Nominal Nominal Nominal Stator Rotor time Fluxing Stray
power voltage current frequency speed resistor constant current reactance
[kW] [V] [A] [Hz] [rpm] [mOhm] [ms] [A] [mH]
B4.29 B4.30 B4.31 B4.32 B4.33 B4.36 B4.37 B4.38 B4.39
0.75 690 1.2 50 1368 11556 44.8 0.93 92.0
1.5 690 2 50 1386 4952 66.3 1.38 45.1
2.2 690 2.8 50 1400 3517 80.9 1.86 33.0
3 690 3.6 50 1410 2500 99.3 2.25 27.6
4 690 4.7 50 1425 1636 123 2.89 21.6
5.5 690 6.4 50 1430 1424 133 3.89 16.0
7.5 690 8.4 50 1442 1055 173 4.88 12.9
11 690 12 50 1450 612 212 6.72 9.40
15 690 16 50 1455 416 248 8.65 7.34
18.5 690 20 50 1464 367 296 11.2 5.67
22 690 23 50 1468 263 362 12.1 5.27
30 690 31 50 1473 184 441 16.0 3.99
37 690 38 50 1475 124 483 19.4 3.30
45 690 46 50 1475 106 490 23.2 2.76
55 690 55 50 1477 71.8 570 26.4 2.44
75 690 74 50 1478 58.1 624 34.2 1.88
90 690 89 50 1480 42.1 678 41.5 1.55

HTSI
110 690 109 50 1482 34.7 746 51.3 1.26
132 690 130 50 1484 24.1 855 60.3 1.07
160 690 157 50 1485 15.7 923 72.2 0.894
200 690 195 50 1486 11 1011 88.0 0.734
250 690 240 50 1486 8.12 1076 103 0.629
315 690 300 50 1488 5.67 1294 126 0.517

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355 690 341 50 1490 5.02 1491 148 0.439
400 690 381 50 1491 4.01 1714 160 0.404
500 690 468 50 1492 3.67 2088 184 0.353
630 690 574 50 1492 2.54 2434 198 0.331
800 690 727 50 1493 2.16 2821 248 0.265

8

Overview of types
The frequency inverters >pDRIVE< MX eco & pro are manufactured in different power ratings. These ratings
correspond with the IEC standard motors and have different dimensions and designs.

Integrated Type of Power part Diagnostic
MX eco MX pro 4V MX pro 6V
braking unit 1) charging fan LEDs
4V0,75 4V0,75 − Resistance DC −
4V11 4V11 − Resistance DC −
− − 6V2,2/3,0 Thyristor DC −
− − 6V7,5/11 Thyristor DC −
HTSI

− − 6V11/15 Thyristor DC −
4V22 4V22 6V22/30 Thyristor DC −
8 P01 035 EN.01/01

4V90 − − Thyristor DC −
4V110 4V90/110 − Thyristor DC −
4V132 4V110/132 − Thyristor 1 x AC −
− − 6V90/110 Thyristor 1 x AC
− − 6V110/132 Thyristor 1 x AC
4V160 4V132/160 6V132/160 Thyristor 1 x AC
4V200 4V160/200 6V160/200 Thyristor 1 x AC
− − 6V200/250 − Thyristor 2 x AC
4V250 4V200/250 6V250/315 − Thyristor 2 x AC
4V315 4V250/315 6V315/400 − Thyristor 2 x AC
4V355 − − − Thyristor 3 x AC
4V400 4V315/400 − − Thyristor 3 x AC
4V500 2) 4V400/500 2)
− − Thyristor 3 x AC
− − 6V400/500 2) − Thyristor 4 x AC
− − 6V500/630 2) − Thyristor 4 x AC
4V630 2) 4V500/630 2)
6V630/800 2) − Thyristor 4 x AC

1)
Only devices of the >pDRIVE< MX pro range have a braking unit built-in or can be equipped with an
external braking unit.
2)
12-pulse-rectifier

9

Maintenance
The frequency inverters >pDRIVE< MX eco & pro are low-maintenance units and contain no moving parts
except the fans. The maintenance intervals depend on the power-on time (0...24 h) and the environmental
conditions of the plant (influences by application and environment).

Visual inspection
During visual inspection the overall condition of the inverter installation should be checked for following points:
− Mechanical damages of the housing
− Traces of oxidation caused by humidity, aggressive gases or liquids
− Dust sedimentation inside the inverter, especially conductive dust
− Dirt and dust sedimentation on the heat sink and the motor terminal board
− Damages of cable isolation (especially at the inverter lead-through)
− Take the actual parameter settings and compare them with the commissioning settings

Cleaning the heat sink

HTSI
Parameter A3.05 "Thermal load VSD" shows the thermal balance which arises from the two factors load and
cooling conditions. If the thermal load reaches 105 %, a fault shut-down "Inverter over temperature" occurs.
Reset can be done if the thermal load is below 80 % again.

If parameter A3.05 reaches high values (values near 100 %) even at low load and ambient temperature,

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it is necessary to clean the heat sink and to check the cooling conditions.

Cooling air holes and filter mats
If the inverters are mounted in a cubicle, the cooling air holes and filter mats, if existing, have to be regularly
checked and exchanged.

Removing the filter mats enables intrusion of dangerous substances, which leads to loss of warranty
claim in case of damage !

10

Maintenance of fans
The frequency inverters up to >pDRIVE< MX eco 4V110, MX pro 4V90/110 and MX pro 6V75/90 contain DC
fans for cooling the power part and the control part.
The inverters from >pDRIVE< MX eco 4V132, MX pro 4V110/132 and MX pro 6V90/110 contain DC fans for
cooling the control part and AC fans for cooling the power part.

The fans of the power part are switched off during impulse inhibit or low load if parameter B3.41 "Fan control"
is set appropriate.
Life cycle of DC-fans: approx. 30.000 hours
Life cycle of AC-fans: approx. 48.000 hours
The ambient condition has an effect on the life cycle of the fans.

Parameters A5.10 "Operating hours fan" and A5.12 "Interval counter fan" show the actual operating time of the
AC fans in the display. By means of parameter A5.11 "Interval fan" a maintenance message can be released
after reaching a preset operation time.

The fans for the control part start running as soon as the inverter is applied with voltage. Therefore
these fans should be replaced precautionary after five years!

Exchanging the control part fans
HTSI

The fans for the control part are 24 V DC fans and are located in the upper part of the inverter (see chapter
"Plans", page 69). Depending on the power the devices are equipped with one to four fans for the control part,
marked with M10, M11, M12 and M13.

When exchanging a fan from >pDRIVE< MX eco 4V160, MX pro 4V132/160 and MX pro 6V90/110 you have to
8 P01 035 EN.01/01

pull the connected plug X30, X31, X32 or X33 and to loosen the four screws. For mounting the new fan
proceed in reverse order.

The drawing shows as example the control part fan and the
corresponding plug for a >pDRIVE< MX eco 4V160. To all other
power ratings the description applies analogously.

11

Exchanging the power part fans

The power part fans are 400 V AC fans and located below the terminal panel on the lower end of the inverter
(see chapter "Plans", page 69). Depending on the power the devices are equipped with one to four fans for the
power part, marked with M1, M2, M3 and M4.

Basically there are two ways to exchange the power part fans:

Exchange from the bottom
For this easy and quick method access from below is required. Possibly the mains and motor cables have to
be disconnected therefor.
1. Pull off the plug of the fan to be exchanged and thread the cables including the grommet through the
terminal panel.
2. Loosen both fixing screws of the fan in the lower end of the inverter approx. 5 mm but do not remove.
3. Lift up the fan and pull it out downwards.
4. Insert the new fan from the bottom, making sure that the upper folding plate sticks into the provided hole.
5. Check whether the gaskets are placed in the right way between the fan and the heat sink.
6. Fasten both fixing screws of the fan in the lower end of the inverter.
7. Thread the plug of the fan and the grommet through the terminal panel and insert the grommet in the right
way again.
8. Finally connect the plug of the fan again.

HTSI
Exchange from the front
In this case no access from the bottom is required. This is advantageous e.g. when the terminal box TER-BOX
is used.
1. Pull off the plugs of all power fans and thread the cables including the grommet through the terminal panel.

8 P01 035 EN.01/01
2. Unscrew all internal power connections (see following drawing).
3. Unscrew all mains connections (L1, L2, L3) and motor connections (U, V, W).
4. Remove the control cables by pulling-off the terminals and the cable conduit on the right-hand side.
5. Unplug following plugs:

Type of device Description
up to MX eco 4V315, Unplug the common plug of all current transformers X11 and
up to MX pro 4V250/315 and thread the cable out.
up to MX pro 6V315/400
for MX eco 4V250 and 4V315, Pull off plugs X1 and X3 on the FCB (A7) and plug X7 on the PB
for MX pro 4V200/250 and 4V250/315, (A1) and thread the cable out.
for MX pro 6V200/250 to 6V315/400
from MX eco 4V355, Demount the middle front cover support by unscrewing the three
from MX pro 4V315/400 and screws.
from MX pro 6V400/500 Unplug the Faston-connector on the RFI (A30, A40):
X1 (6.3 mm, yellow), X11 (4.8 mm, yellow)
X2 (6.3 mm, green), X12 (4.8 mm, green)
X3 (6.3 mm, violet), X13 (4.8 mm, violet)
6. Unscrew the earth screw on the left inner wall (see following drawing).
7. Unscrew the 6 screws of the terminal panel and lift it to the front.
8. Loosen both fixing screws of the fan(s) in the lower end of the inverter approx. 5 mm but do not remove.
9. Lift up the fan, push it downwards and pull it out forward.
10. Insert the new fan making sure that the upper folding plate sticks into the provided hole.
11. Check whether the gaskets are placed in the right way between the fan and the heat sink.
12.Fasten both fixing screws of the fan in the lower end of the inverter.
13.Execute points 1...6 in reverse order.

12

The drawing shows as example the power part fan of a >pDRIVE< MX eco 4V200. To all other power ratings
the description applies analogously.
HTSI
8 P01 035 EN.01/01

For fastening the power connections (internal power connections as well as mains and motor
connections) use the following tightening torques:
M10 (wrench size 16/17): 24 Nm
M12 (wrench size 18/19): 41 Nm

Load test
Each maintenance should be concluded by a load test (preferable with nominal load). Thereby the overall
behaviour of the drive should be observed (dynamic behaviour, oscillations, ...). Additionally the input and
output currents should be measured and checked for symmetry in all three phases. After this check the
thermal stress of the power terminals when there is no voltage.

13

Troubleshooting

Diagnostics
Comprehensive diagnostic functions are available in order to make troubleshooting and problem solving easier
(e.g. data logger, status displays of inputs and outputs, analog checkpoints and status displays of the power
part and the option cards.

The detailed description of diagnostic functions can be found in the "Description of functions",
parameter group F4.

PC software Matrix 3
The PC software Matrix 3 is provided on the CD which is attached to each inverter and can be downloaded
from the homepage www.pdrive.com alternatively. Besides online parameterization functions it affords an
extensive and clear online diagnostics. This function shows all inverter states in a concise graphic way.

HTSI
For communication between PC and inverter a RS232/485 converter is necessary (CABLE 3-PC, Order
no. 8 P01 124).
The interface cable of Matrix 2 can not be used!

Wrong screen resolutions may lead to display problems.

8 P01 035 EN.01/01
Following screen resolution is recommended: 1024x768 or higher.

Following functions are available in the online diagnostics:

Device description

This function provides a quick overview of the most important inverter data as e.g. inverter type, software
version, operating hours, option cards, a.s.o.

14

Power path

This function shows the power path Mains - Inverter - Motor. Moreover the most important values are shown.

Input/Output state

Clear display of parameter settings and status of the individual in- and outputs of the basic card and the option
HTSI

cards.
8 P01 035 EN.01/01

15

Reference value path

Shows the parameterization and the actual values of the reference value path from the reference source up to
the inverter reference value.

HTSI
Bus settings

Shows the parameterization and the actual values of the bus configuration.

8 P01 035 EN.01/01

16

Combination of comparators

Shows the active comparators, logic modules, SR modules and time modules including their configuration and
state. If none of these functions is used, this tab is empty.

Configurable display
HTSI

The configurable display enables the display of selected parameters in list form. Moreover four digital and
three analog signals can be shown.
8 P01 035 EN.01/01

The modification of the channels in the status range also changes the channel settings in the trend
recorder and in the online parameterization.

17

Fault memory

By using this function, the last eight trip messages (incl. operating states) can be read out. Furthermore the trip
messages can be saved as flt-file.

Trend recorder

HTSI
The trend recorder enables to make a real-time recording of selectable analog and digital signals. Furthermore
useful functions like trigger and cursor are provided. The recorded curves can be saved as trd-file.

8 P01 035 EN.01/01

18

Data Logger

The function of the Data Logger offers the possibility to record up to three channels in time averaged form or
as peak value. The recording serves as listing or as statistical evaluation of electrical values (e.g. energy) or
known process values of the inverter (pressure, flow, speed, vibration). Thereby the number of channels, the
value to be recorded and the time base can be set. The recorded data can be saved as stc-file.
Before starting a record, this function has to be enabled and set up in parameter group F4. For detailed
parameter description please also see the "Description of functions".
HTSI
8 P01 035 EN.01/01

19

Troubleshooting guide
The troubleshooting guide makes a first and easy fault definition possible.

Proper lightening Is there a trip YES
and display of the YES
indicated on the
operating panel? display?

NO NO

Start the motor via the
Are the mains YES operating panel or the
fuses defect? control terminals.

NO

Are the fuses YES Is there a trip YES
F1-F3 on the RFI indicated on the
board defect? display?

HTSI
NO NO

Check the mains voltage at the Check motor running. Disconnect
inverter input for value and symmetrie. Carry out fine adjustment if the motor.
Check the components upstream and necessary (autotuning and

8 P01 035 EN.01/01
the wiring as well. dynamic parameters)

Is the mains Is there still
NO YES
voltage applied to a fault?
the inverter?

YES NO

Check the internal Defect varistors or Check the power Handle the trip Check the Further
voltage supply, defect power board, semiconductors, message motor and the checking
see chapter see chapter according to cables alternatives
complete service!
"Hardware "Hardware chapter are given in
(check Y/Δ-
diagnostics“. diagnostics“. "Troubleshooting“. chapter
connection,
"Diagnostic
make
LEDs"
insulation
measurement)

General advice for troubleshooting:
• If a fault occurs during commissioning, the reason is in all probability an external fault because the
inverters are checked for full functionality before delivery.
• When a fault occurs after some time in operation, the reason could be either an external fault or an
inverter fault.

20

Fault memory
The fault memory provides a protocol of the last eight fault shut-downs and therefore it supports you in
detecting the cause of the fault. For each fault shut-down a number of operating states are stored and
provided for manual evaluation.

The fault memory can be also read out automated when using the PC software Matrix 3.

F3.01 Number of faults Last entry in the memory: 15

F3.02 Review 2 .. Event -2 1 .. Last event -1 0 .. Last event

F3.03 Fault number 13 14 15
F3.04 Fault cause 52 .. Stall protection 19 .. ϧ M1 >> 58 .. External fault 1
F3.05 Operating hours 1362h 1438h 1817h
F3.06 Min / sec 13.17 m:s 55.32 m:s 2.55 m:s
F3.07 Reference value [Hz] +50.0 Hz +22.0 Hz +50.0 Hz
F3.08 Actual value [Hz] +0.7 Hz +22.0 Hz +50.0 Hz
F3.09 Output current 60.2 A 47.8 A 34.2 A
HTSI

F3.10 DC voltage 533 V 541 V 545 V
F3.11 Thermal load VSD 13 % 82 % 73 %
F3.12 Control mode Terminals Terminals Terminals
F3.13 Operating status Acceleration f = f ref f = f ref
F3.14 Alarm message - ϑM1 > -
8 P01 035 EN.01/01

F3.15 Drive state RUN RUN RUN
F3.16 Bus STW 007F 007F 007F
F3.17 Bus ZTW 007F 007F 007F

All diagnostic values correspond to the actual values 10 ms before fault shut-down.

21

Trip messages
MX eco
E01 Undervoltage
MX pro
Description There is an undervoltage situation. See parameter E3.29 "V< response".
Cause The mains voltage is missing or out of the specified range.
Remedy Check all three mains phases and fuses. If an operation with partial load is possible, check
the three line currents for symmetry by measurement in a stable operating state (max.
permissible unsymmetry of currents approx. 3 %).
Cause If the message occurs immediately after power up, the charging circuit does not work
correctly.
Remedy Check LED 8 and 9. If both LEDs are alright, make a measurement of the input rectifier (see
chapter "Measurement of power semiconductors", page 57).
Cause Loss of line phase occurs at deactivated line phase monitoring (E3.27) and full load.
Remedy Check the value and wave form of the three mains phases and also check the mains fuses.
The voltage levels of the undervoltage trigger are given in chapter "Voltage levels", page 62.

MX eco
E02 V>> at deceleration
MX pro
Description The DC link voltage has exceeded the hardware protection level of 825 V (for MX pro 6V:
1174 V) due to a deceleration.
Cause The set deceleration ramp is too short or "Fast stop" is used. Therefore the motor works as
generator.

HTSI
Remedy Extend the deceleration ramp or use B5.01 "Brake mode" for activating the motor brake or
the braking unit.
Deactivate setting "4 .. Extend & trip" of parameter E1.21 "Reaction at deceleration" or
extend E1.22 "Time Δt".
Cause Instable controller due to wrong motor data (e.g. autotuning was performed with warm

8 P01 035 EN.01/01
motor)
Remedy Execute autotuning again with cold motor.
Cause Instable controller due to wrong dynamic settings
(MX eco: B3.20 and B3.21, MX pro: C5.01...C5.03)
Remedy Optimize the controller settings empirically on the basis of the factory settings.
Cause A sinus filter is used but B3.02 Control mode is not set to "V/f" (for devices from MX eco
4V90, MX pro 4V90/100 and MX pro 6V90/110 a parameterization alarm is displayed).
Remedy Choose a proper V/f control method with B3.02.
Cause When using a >pDRIVE< MX pro in exchange for an MX plus, an overvoltage switch-off takes
place during deceleration with the existing braking resistors.
Remedy Use braking resistors as specified in the catalogue.

22

MX eco
E03 Line overvoltage
MX pro
Description The DC link voltage has exceeded the protection level of 756 V (for MX pro 6V: 1087 V). This
fault is only evaluated during the charging process!
With devices up to 75 kW this message also appears when the hardware protection level of
825 V (for MX pro 6V: 1174 V) has been exceeded in case of impulse inhibit.
Cause Mains voltage fluctuations or voltage peaks may occur because of mains voltage return
(choke energy causes voltage raise) or because of commutation drops caused by other
loads.
Remedy Check the DC link voltage by means of parameter A3.04 "DC voltage" and a measuring
instrument (at no-load operation approx. 1.4 x VMains; at full load approx. 1.35 x VMains).
If the displayed value does not comply with the measured value, the voltage measurement is
defect.
Use a line contactor control for immediate disconnection of the DC link from the mains or
use a braking unit to limit the DC link voltage.
Cause Single phase earth fault in the motor or the motor cable at nongrounded mains
Remedy Check the motor and the motor cable → see "Insulation measurements". If the motor cable
is disconnected from the inverter, overvoltage must not occur any more.

MX eco
E04 MC not ready
MX pro
Description The motor control is not ready within 4 s after the charging process.
Cause After the charging process the motor control registers, that e.g. the DC link voltage is out of
the specified range or missing or charging is still in progress (∆V too high).
HTSI

Remedy Check the DC link voltage according to the table in chapter "Voltage levels", page 62.
Cause The inverter electronics is supplied externally by 24 V. A start command is given although
there is no mains voltage.
Remedy Check the mains voltage or switch on the mains supply.
Cause
8 P01 035 EN.01/01

A mains voltage drop occurs at activated DC holding brake (B5.20).
Remedy Deactivate the DC holding brake or update the device to the latest device software.
Cause The charging circuit on the soft charge board is defective.
Remedy Check the diagnostic LEDs (see chapter "Diagnostic LEDs", page 50).
Check all cables at the control block.

MX eco
E05 DC missing
MX pro
Description The frequency inverter is operated at the intelligent rectifier >pDRIVE< LX. The DC link
voltage, made available by this rectifier, has shut down.
Cause Parameter B3.44 of the inverter is set to "Operation with IR" and the DC link voltage fell
below the limit (see chapter "Voltage levels", page 62).
Remedy Check the DC link voltage (e.g. by means of the PC program Matrix).
Check whether the >pDRIVE< LX is dimensioned too small and if it operates properly.
Cause The frequency inverter is supplied with an external DC link voltage. Thereby, for example,
voltage fluctuations and voltage drops occur due to heavy duty starts nearby the inverter.
Remedy Check the DC voltage for voltage drops and the fault memory with parameter F3.10.
Discharge the inverter during an external heavy duty start by means of deceleration or
impulse inhibit, if the process allows.
Use more powerful supply possibly from another power distributor.

23

MX eco
E06 Precharging fault
MX pro
Description Fault of the soft charge device (half controlled thyristor bridge).
Only for devices larger than >pDRIVE< MX eco & pro 4V18 as well as for all >pDRIVE< MX
pro 6V.
Cause The charging of the DC link has not been completed successfully because the required
voltage level has not been reached.
Remedy Check the DC link voltage according to the table in chapter "Voltage levels", page 62.
Execute the routine "Test charging circuit" by means of parameter F2.41. This test may last
up to 20 minutes for devices ≥ 90 kW.
Maybe the soft charge board, the power board or the thyristors are defective. Check the
diagnostic LEDs (see chapter "Troubleshooting with the aid of LEDs", page 53).

MX eco
E08 Line fault 1p
MX pro
Description Loss of one mains phase
This fault is displayed in the drive states "Ready" and "Run" but it is only stored in the fault
memory in case of "Run".
Cause One phase is missing on the mains supply or the mains phases are very unsymmetrical.
Check the fuses on the RFI board.
Deactivate the mains phase monitoring with parameter E3.27.
Cause The inverter is operated at a DC bus.

HTSI
Remedy Deactivate the mains phase monitoring with parameter E3.27.

MX eco
E09 Line fault 2-3p
MX pro
Description Loss of two or three mains phases

8 P01 035 EN.01/01
This trip message is only stored in the fault memory in case of pulse enable.
Cause Two or all three phases are missing on the mains supply or the mains phases are very
unsymmetrical.
Check the fuses on the RFI board.
Cause Mains supply disconnected e.g. by emergency OFF button, hoist master switch, ...
Remedy Integrate the line contactor control by means of parameter C6.07 or deactivate the mains
phase monitoring with parameter E3.27.
Cause The inverter is operated at a DC bus.
Remedy Deactivate the mains phase monitoring with parameter E3.27.

24

MX eco
E10 Overcurrent
MX pro
Description Overcurrent at the output
The registration takes place by means of the current transformers or the shunts, a switch-off
is carried out approx. at triple nominal current.
Cause Short circuit or earth fault in the motor or motor cable.
Remedy Check the motor and the motor cables → also see "Insulation measurements". If the motor
cable is disconnected from the inverter, overcurrent must not occur any more.
Cause The motor is switched during operation of the inverter by means of a motor contactor.
Remedy Apply impulse inhibit to the inverter first and then switch the motor lines or use the motor
contactor control with parameter C6.08.
Cause Faulty inverter part
Remedy Execute the IGBT test with parameter F2.40.
Cause Overcurrent message in case of encoder operation if parameter B3.02 "Control mode" is set
to "4 .. VC feedback" and parameter D5.01 "SFB use for" to "2 .. VC feedback" and motor
excitation is not active.
Remedy Set parameter B3.27 "Motor fluxing" to "1 .. At start" or "2 .. Always active".
Cause The connected motor is significantly larger than the nominal power of the inverter.
Remedy Check the dimensioning of motor and inverter.
Cause A current transformer is defective.
Remedy Check whether the current display at impulse inhibit is approx. zero.
Check the diagnostic LEDs of the current transformer supply (see chapter "Diagnostic
HTSI

LEDs", page 50).
Check the current transformers (see chapter "Checking the current transformers", page 60).
Cause Instable controller due to wrong motor data (e.g. autotuning was performed with warm
motor).
Remedy Execute autotuning again with cold motor.
8 P01 035 EN.01/01

In case of conus motors the rotor has to be unlocked during autotuning.
Cause Motor data are wrong or not adjusted.
Remedy Check the setting of the motor data under B4 and execute autotuning.
Cause Autotuning has not been executed.
Remedy Start the autotuning routine by means of parameter B4.03.
Cause Wrong motor connection (Y/Δ) or wiring failure.
Remedy Check the connection of the motor, the motor cables and the motor contactor.
Cause Oscillations occur because the dynamic settings of the speed controller are not optimized.
Remedy Optimize parameters B3.20 and B3.21 for >pDRIVE< MX eco or C5.01 and C5.02 for
>pDRIVE< MX pro.
Cause Defect power part
Remedy Check the three output currents for symmetry by measurement of the three motor currents in
a stable operating state (max. permissible unsymmetry of currents approx. 3 %).
Execute the IGBT test with parameter F2.40.

MX eco
E11 Motor earth fault
MX pro
Description Earth fault at the output. The evaluation by the hardware is only performed for devices up to
>pDRIVE< MX eco & pro 4V75 and >pDRIVE< MX pro 6V75/90. For devices with higher
power the trip message E12 appears.
See trip message E12 for possible causes and remedy.

25

MX eco
E12 Insulation fault
MX pro
Description Earth fault at the output. The differential current determined from the three motor phases is
larger than 25 % of the nominal current of the inverter.
Cause There is an insulation fault in the motor or motor cable.
Remedy Check the motor and the motor cables → also see "Insulation measurements".
When the motor cable is disconnected from the inverter or simulation mode is activated in
F2.45, the fault message must not occur any more.
Cause Current transformer defective
Remedy Perform a measurement of the current transformers (see chapter "Checking the current
transformers", page 60).
Cause Faulty inverter part
Remedy Execute the IGBT test with parameter F2.40.

MX eco
E13 Overcurrent
MX pro
Description Overcurrent at the output. The evaluation is only performed for devices up to >pDRIVE< MX
eco & pro 4V75 and >pDRIVE< MX pro 6V75/90. For devices with higher power the trip
message E10 appears.

MX eco
E14 IGBT ϧ >>
MX pro

HTSI
Description IGBT overtemperature (junction temperature), determined by the thermal mathematical
model.
The thermal mathematical model considers the frequency, current, pulse frequency and the
measured heat sink temperature and is primarily decisive at frequencies near zero.
Cause The inverter has calculated that the load of the IGBTs was critical. This may happen mainly

8 P01 035 EN.01/01
at low output frequencies < 3 Hz or at DC operation (braking or heating).
Remedy Check the application for DC operation or low output frequency operation.
Cause The power supply of the fans broke down or the fans are mechanically blocked.
Remedy See description of LED functions and power part fans, chapter "Diagnostic LEDs", page 50.
Cause Short circuit of a power part fan.
Remedy Check the fuses FU1...FU3 on the fan control board.
Cause The inverter gets too less cooling air.
Remedy Check the cooling air holes for sufficient sizing and clean the filter mats.
Cause Ambient temperature or temperature of the supply air too high.
Remedy Ensure that the ambient conditions are permitted.
Check the cubicle for thermal short circuit.
Check the supply and outlet air holes of the cubicle for dirt and enlarge them, if necessary.
Cause The encoder is connected wrong.
Remedy Exchange the encoder signals channel A and B.
Execute a test of the encoder by means of parameter F2.42.

26

MX eco
E15 Motor phase fault 3p
MX pro
Description Loss of the three motor phases (recognition at approx. 6% of the set nominal motor current)
Cause Loose connection, defect motor, defect cable or defect switching elements
Remedy Check the motor, the motor cables as well as all terminals (contact resistance) of
disconnecting switches for maintenance purposes, safety switches and contactors.
Check the connection between inverter and motor as well as the motor contactor control, if
used.
Deactivate the monitoring of the motor phases by means of E2.54.
Cause The used motor is significant smaller than the nominal power of the inverter.
Remedy Use a motor that corresponds with the inverter power (the minimum motor power should not
fall below the half nominal inverter power).

MX eco
E16 Motor phase U lost
MX pro
Description Loss of motor phase U
Recognition takes place only in case of V/f control methods on the basis of the geometrical
average of the three phase currents. It is triggered after 0.5 s when current is < 25 % of the
nominal current.
Cause Loose connection, defect motor, defect cable or defect switching elements
Remedy Check the motor, the motor cables as well as all terminals (contact resistance) of
disconnecting switches for maintenance purposes, safety switches and contactors.
HTSI


MX eco
E17 Motor phase V lost
MX pro
Description Loss of motor phase V
8 P01 035 EN.01/01


MX eco
E18 Motor phase W lost
MX pro
Description Loss of motor phase W

MX eco
E19 Inverter overtemp.
MX pro
Description Inverter overtemperature (A3.05 "Thermal load VSD" > 105°C), determined by the thermal
mathematical model.
The thermal mathematical model considers the temperature, current and time. In addition to
the heat sink sensor also the powerboard sensor and the braking unit sensor are monitored.
Cause The power supply of the fans broke down or fans are mechanically blocked.
Remedy See chapter "Diagnostic LEDs", page 50 and chapter "Maintenance of fans", page 11.
Cause Short circuit of a power part fan.
Remedy Check the fuses FU1...FU3 on the fan control board.
Cause The inverter gets too less cooling air.
Remedy Check the cooling air holes for sufficient sizing and clean the filter mats.
Cause Ambient temperature or temperature of the supply air too high.
Remedy Ensure that the ambient conditions are permitted.
Check the cubicle for thermal short circuit.
Check the supply and outlet air holes of the cubicle for dirt and enlarge them, if necessary.
Cause Fan of the control part or the braking unit defect
Remedy Check the function and effectiveness of the fans.

27

MX eco
E20 Unknown MC
MX pro
Description Unknown power part
Cause After exchanging the control electronics or the power board the versions do not match.
Remedy Ensure that proper spare parts have been used.
Compare parameters F1.01 and F1.02 with the name plate data.
Cause An internal electronics failure occurred.
Remedy Shut down mains supply, wait for complete discharge of DC link (LED 1) and switch on
again.

MX eco
E21 PTC short circuit
MX pro
Description Short-circuit at a thermistor (PTC) sensor (TH1, TH2, TH3, TH heat sink)
Cause A thermistor input or the thermistor of the heat sink is short circuited (value < 50 Ω).
Remedy Check the thermistor connections and the thermistor sensors in the motor.
Cause DI6 is parameterized as thermistor, but used as a digital input.
Remedy Check whether DI6 is used as digital input but parameterized as thermistor.
Cause A thermal switch is used instead of a thermistor sensor.
Remedy Set TH verification to "0 .. Not active" (parameter E2.05, E2.10, E2.15).
If the fault is still present, the internal thermistor is defect.

MX eco
E22 PTC open circuit
MX pro

HTSI
Description A thermistor (PTC) sensor is open (TH1, TH2, TH3, TH heat sink)
Cause A thermistor input or the thermistor of the heat sink is open (value > 100 kΩ).
Remedy Check the thermistor connections and the thermistor sensors in the motor.
Cause DI6 is parameterized as thermistor, but used as a digital input.

8 P01 035 EN.01/01
Remedy Check whether DI6 is used as digital input but parameterized as thermistor.
Cause A thermal switch is used instead of a thermistor sensor.
Remedy Set TH verification to "0 .. Not active" (parameter E2.05, E2.10, E2.15).
If the fault is still present, the internal thermistor is defect.

MX eco
E23 ASIC Init fault
MX pro
Description ASIC on the motor control cannot be initialized.
Cause An internal failure occurred.
again.
If the fault is still present, the control block has to be exchanged.

MX eco
E24 SFB fault
MX pro
Description Encoder failure (see "Description of functions" D5).
Cause Encoder is not connected.
Remedy Check the encoder and its connection.
Cause Wrong direction of rotation of the encoder.
Remedy Exchange signals A and B or change the rotational direction of the motor by interchanging
the motor cables or adjust parameters C2.04 "Phase rotation" or D5.04 "Encoder rotation".
Finally execute the routine F2.42 "Test encoder".
Cause The encoder signal does not correspond with the used option >pDRIVE< SFB.
Remedy Check the compatibility of encoder signal and encoder card.

28

MX eco
E25 IGBT fault
MX pro
Description The desaturation protection of an IGBT has triggered (an IGBT does not switch on or off
within 6 μs).
The registration of this fault occurs only with devices larger than >pDRIVE< MX eco & pro
4V75 and >pDRIVE< MX pro 6V75/90.
Cause Although an IGBT has got an on-command, it does not switch on or off.
Remedy Execute the IGBT test with parameter F2.40. Therefor the motor has to comply at least 30 %
of the inverter power.
See also chapter "Measurement of power semiconductors", page 57.

MX eco
E27 IGBT short circuit
MX pro
Description Electronically determined short circuit at one of the IGBTs during "Power up".
Cause During the "Power up" routine all IGBTs are checked for short circuit. Thereby a failure (short
circuit or interruption) has been detected for at least one IGBT.
Remedy Execute the IGBT test with parameter F2.40. Therefor the motor has to comply at least 30 %
of the inverter power.
See also chapter "Measurement of power semiconductors", page 57.

MX eco
E28 Motor short circuit
MX pro
Description The automatically running test routine B3.43 "Automatic SC test" has detected a short circuit
at the output.
HTSI

Cause There is a short circuit at the inverter output.
Remedy Check the motor, the motor cables and connections.
Cause Inexact setting of motor data although autotuning as been carried out successfully and also
operation without motor contactor control works.
Remedy The motor data must exactly comply with the name plate data. Execute autotuning again
8 P01 035 EN.01/01

afterwards.
Cause In case of motor contactor control the motor contactor is switched on too quickly after
switching off.
Remedy After disconnection wait at least 5 times of the rotor time constant (B4.14, B4.25, B4.37)
before connecting the motor contactor again.

MX eco
E30 Current measure fault
MX pro
Description Fault of the current transformer, its voltage supply or the evaluation electronics.
The registration of this fault occurs only with devices larger than >pDRIVE< MX eco & pro
4V75 and >pDRIVE< MX pro 6V75/90.
Cause Fault of the current transformer, its voltage supply or the evaluation electronics.
Remedy Check LEDs 5 and 6 (see chapter "Diagnostic LEDs", page 50).
Perform a measurement of the current transformers (see chapter "Checking the current
transformers", page 60).

MX eco
E31 Braking unit fault
MX pro
Description Fault at the braking unit
Cause The IGBT of the braking unit is short circuited.
Remedy Perform a measurement of the braking transformer.
In order to protect the braking resistor a line contactor has to be integrated (see catalogue,
chapter "Braking unit BU").

29

MX eco
E32 MC E² zones invalid
MX pro
Description Motor control EEProm defect
Cause An internal failure of the motor control electronics occurred.
again.

MX eco
E33 CPU fault
MX pro
Description Internal electronic fault
Cause A failure of the internal electronic occurred.
again.
Cause Excessive use of all software functions
Remedy Deactivate functions which are not required like e.g. function blocks, curve generator or XY
graph.

MX eco
E34 ISL fault
MX pro
Description Communication fault on the internal serial link
Cause A failure of the internal electronics occurred, e.g. based on external interferences.

HTSI
again.
Check whether there is a source of interferences nearby.

MX eco
E35 MTHA fault

8 P01 035 EN.01/01
MX pro
Description Asic for time measurement defect (undervoltage time determination).
again.

MX eco
E36 Overspeed
MX pro
Description The motor has exceeded the maximum allowed Overspeed level (E2.50).
Cause The setting of the motor data is not correct.
Remedy Adjust the motor data under B4 according to the name plate data.
Cause The overspeed level E2.50 is set too low.
Remedy Adapt parameter E2.50 to the application.
Cause The application needs higher speed as planed.
Remedy Check the application for speed range and generator operation.
Cause The fault occurs during catch on the fly.
Remedy Increase parameter B3.37 Remanence level.

30

MX eco
E37 Safe Standstill
MX pro
Description There is a fault in the area of the internal monitoring for function "Safe Standstill" (PWR).
Cause The line of the PWR signal is too long or has bouncing contact.
Remedy Check the PWR line and ensure well switching contact.
Cause The inverter electronics is only supplied by 24 V.
Remedy Supply the inverter with mains voltage.
again.

MX eco
E38 IO12 comm. fault
MX pro
Description Communication fault at option card >pDRIVE< IO12
Cause The communication with option card >pDRIVE< IO12 does not work properly (e.g. because
of bad mounting).
Remedy Check the mechanical mounting and connection of the option cards.
Remove the option card or exchange the cards when two option cards are used and observe
whether the fault message remains.
Shut down mains supply, wait for complete discharge of DC link (LED 1) and switch on
again.
Cause Short interrupts or interferences to the terminals of the option card.
HTSI

Remedy Check all terminal connections for loose contact and correct screen connection.

MX eco
E39 Opt. comm. fault
MX pro
Description Communication fault at an option card (timeout failure)
8 P01 035 EN.01/01

Cause The communication with an option card does not work properly (e.g. because of bad
mounting).
Remedy Check the mechanical mounting and connection of the option cards.
Remove the option card or exchange the cards when two option cards are used and observe
whether the fault message remains.
Shut down mains supply, wait for complete discharge of DC link (LED 1) and switch on
again.
Cause Switching of parameter sets via a digital input is only activated in one parameter set.
Therefrom a permanent switching between the parameter sets takes place.
Remedy Deactivate setting "Switch-over with DI" of parameter B2.03 "Parameter mode" or use the
same digital input for switching ("76 .. 2nd parameter set") in both parameter sets.

MX eco
E40 Wrong option board
MX pro
Description Defect or unknown option card used
Cause An option card is identified but it is not supported by the software.
Remedy Check the compatibility of option card versions.

31

MX eco
E41 Bus fault
MX pro
Description A bus fault occurred due to exceeded run time or loss of control.
Cause Interrupt of the bus connection or failure of the master
Remedy Reconnect the bus and check the master.
Check the bus hardware (incl. terminating resistors, screen, connectors, ...).
Equip the contactors with protective circuits (RC elements).
Cause "Watch Dog" has elapsed, that means that the cycle time of the master during data
exchange is too long.
Remedy Check the "Watch Dog" times in the parameterization telegram and change them, if
necessary.
Cause Wrong setting of the communication type at the frequency inverter.
Remedy Adjust the right communication type using parameter D6.100 No. of Bus-ref. values.
Cause The master uses a wrong GSD file (type file).
Remedy Only use the GSD files included in delivery for parameterization of the master.
Cause The bus "crashes" because the number of the bus subscribers is too high or the cycle time
gets too long due to a defect subscriber.
Remedy Check the state and the number of the subscribers.
Cause A wrong communication function is set at the master.
Remedy In case of Simatic S7 the PBO types 1, 2 and 4 as well as the SFC14 function (read
peripheral data) and the SFC 15 function (write peripheral data) have to be used. In case of
PBO type 3 the function "load data" and "transfer data" must be used.

HTSI
MX eco
E42 Param. config. fault
MX pro
Description Parameter settings invalid
Cause The parameter settings are contradictory.
Remedy Load a new macro with parameter B2.02 Macro selection.

8 P01 035 EN.01/01
Thereby the existing settings are overwritten (except macro-independent parameters, see
chapter "Factory setting", page 6).

MX eco
E43 Reference fault AI2
MX pro
Description At the analog input AI2 the reference value fell below 2 mA.
Cause There is no reference value at the terminals.
Remedy Check the reference value using parameter A4.03 or a measuring instrument.
Cause The reference value is connected with wrong polarity.
Remedy Check the connection of the analog signal (terminal AI2: +, terminal COM: -).
Cause A 0...20 mA signal is used.
Remedy Use a 4...20 mA signal (also see Description of functions, chapter D1).

MX eco
MX pro
Remedy Check the connection of the analog signal (terminal AI3+, terminal AI3-; also see Description of
functions, chapter D1).

32

MX eco
MX pro
Remedy Check the connection of the analog signal (terminal AI4: +, terminal COM: -; also see
Description of functions, chapter D1).

MX eco
E46 Reference fault FP
MX pro
Description At the frequency input FP the reference value fell short by 50 % of the setting fmin (D1.30).

MX eco
E47 TH ϧ M1 >>
MX pro
Description At least one of the thermistors (PTC) or thermal switches assigned to motor M1 (see motor
assignment E2.01, E2.06, E2.11) has detected an overtemperature.
Cause The connected motor is overloaded.
Remedy
HTSI

Check the motor temperature.
Avoid overload, reduce the operating time or the max. allowed motor current (E1.01, E1.02).
Check the ambient temperature and the external fan (if existing).
Cause There is no PTC thermistor connected to the terminals DI6, TH2 or TH3 or the connection is
interrupted.
Remedy Check the connection of the thermistors.
8 P01 035 EN.01/01

Set the thermistor input with E2.01, E2.06, E2.11 to "Not used".
Cause Interspersions to thermistor lines
Remedy Use screened thermistor lines. Only connect the screen to the frequency inverter and not to
the motor. Avoid parallel laying with motor cables.
Reduce the pulse frequency.

MX eco
E48 TH ϧ M2 >>
MX pro
Description At least one of the thermistors (PTC) or thermal switches assigned to motor M2 (see motor
assignment E2.01, E2.06, E2.11) has detected an overtemperature.
Remedy Check the motor temperature.
interrupted.

33

MX eco
E49 TH ϧ Ext >>
MX pro
Description At least one of the thermistors (PTC) or thermal switches, which are planned for the general
use (see assignment E2.01, E2.06, E2.11) has detected an overtemperature.
interrupted.

MX eco
E50 ϧ M1 >>
MX pro
Description The thermal mathematical motor model has reached the set trigger level for motor M1.
Check the setting of parameters E2.18...E2.26.

HTSI

MX eco
E51 ϧ M2 >>
MX pro
Description The thermal mathematical motor model has reached the set trigger level for motor M2.

8 P01 035 EN.01/01

MX eco
E52 Stall protection
MX pro
Description The stall protection has triggered due to a rotor blockade or a highly overloaded starting.
See parameters E2.42...E2.45.
Cause The drive is mechanically blocked or overloaded.
Remedy Check the drive system for mechanic overload and also check parameters E2.42...E2.45.
Cause The operating frequency is in the range of parameters E2.42...E2.45 (e.g. crane hoisting with
external fan)
Remedy Adapt parameters E2.42...E2.45 to the operation.
Cause A motor phase is disconnected (e.g. cable break or defect switching element in the motor
line). The frequency inverter does not increase 0.1...0.5 Hz and displays high current.
Remedy Check all cables and switching elements.
Cause An encoder is used and channel A and B are connected wrong.
Remedy Check the connection of the encoder.

MX eco
E53 Underload
MX pro
Description The underload function (E2.61...E2.61) has recognized a motor underload.
Cause The load of the motor is lower than expected or the setting of the underload monitoring is
wrong.
Remedy Check the load of the motor and the drive system.

34

MX eco
E54 Speed check fault
MX pro
Description The function n-monitoring (E1.38) has recognized an overspeed.
This trip message is only assigned to a digital input and not to the encoder at the option
card.
Cause The mechanic transmission between motor and engine is damaged (e.g. belt break).
Remedy Check the mechanical transmission system.
Cause The external speed detection is defective or mounted wrong or the setting of parameters
E1.38 .. E1.46 is wrong.
Remedy Check the speed detection and the parameter settings.

MX eco
E55 Feed in <<
MX pro
Description The function Feed-in monitoring (E1.49) has triggered.
Cause The medium to be monitored has too low prepressure or the setting of parameters
E1.49...E1.51 is wrong.
Remedy Check the sensor signals and the feed-in rates e.g. regarding pipe break, filling level, ...
Check the parameter settings.

MX eco
E56 AT-fault 1
MX pro
Description Fault at the execution of the autotuning routine
Cause
HTSI

The parameterized motor data extremely differ from the measurement.
Remedy Check the parameterization of the motor data (also see chapter "Factory setting", page 6).
Operate the motor with V/f mode (B3.02) and check whether the function is alright in
principle.
Cause Wrong motor connection (Y/Δ) or wiring failure.
Remedy Check the connection of the motor, the motor cables, the motor contactor and the bypass
8 P01 035 EN.01/01

circuit, if existing.
Cause Autotuning has to be executed while the motor does not turn.
Remedy Ensure that the motor is not turning.
Cause The connected motor power does not correspond with the nominal inverter power.
Remedy The motor power should be at least one step higher and not lower than the half nominal
power of the inverter.
Cause Autotuning has been started with 24 V buffer voltage while there was no mains voltage.
Remedy Ensure that mains voltage is supplied.
Cause There is no motor connected or a motor contactor or disconnecting switch for maintenance
purposes is open.
Remedy Check the connection between inverter and motor.

MX eco
E57 Config. fault
MX pro
Description EEProm application software incompatible or changed power part.
again.

35

MX eco
E58 External fault 1
MX pro
Description An external fault is signalized via a digital input function, a logic block or the bus (see
E3.34...E3.38).
It is an external terminal function and no defect of the frequency inverter!
Cause The function E3.34 is activated but the parameterization or wiring for the terminal "External
fault 1" is missing.
Remedy Check whether a digital input D2.01 .. D2.14 is set to "External fault 1" and whether the
wiring is correct.
Cause The logic of the digital inputs (PNP source or NPN sink) does not correspond with the
control.
Remedy Select the right logic with sliding switch SW1 (IO11: SW3, IO12: SW4). Also see catalogue,
chapter "Control terminals".

MX eco
E59 External fault 2
MX pro
Description An external fault is signalized via a digital input function, a logic block or the bus (see
E3.41...E3.45).
Cause The function E3.41 is activated but the parameterization or wiring for the terminal "External
Remedy Check whether a digital input D2.01 .. D2.14 is set to "External fault 2" and whether the
wiring is correct.

HTSI
control.

MX eco
E60 Line contactor fault

8 P01 035 EN.01/01
MX pro
Description Line contactor control defect (response monitoring)
At active line contactor control (parameter C6.07) the DC link voltage is missing or below the
nominal value. An external 24 V supply must exist.
Cause After a start command the DC link voltage does not reach its nominal value within 3 seconds.
Remedy Check the mains voltage, the line contactor and the line contactor control.

MX eco
E61 (E62) Motor contactor error
MX pro
Description Feedback for motor contactor control faulty.
Cause The inverter-internal motor contactor control is activated and a start command is given. But
there is no feedback of the motor contactor within a second that it has been closed.
Remedy Check the activation and wiring of the motor contactor and the confirmation.

MX eco
E63 ON lock
MX pro
Description The digital input function "ON lock activation" (E3.48) caused a protective shut-down.
Cause ON lock is signalized via a digital input function (see E3.48...E3.50).

Remedy Check whether a digital input D2.01 .. D2.14 is set to "ON lock" and whether the wiring is
correct. For operation the safety chain must be closed (N.C.).

36

MX eco
E64 Internal SW error
MX pro
Description Internal software bug
Cause An internal software failure occurred.
again.

MX eco
E65 Power rating fault
MX pro
Description Unclear power part assignment
again.

MX eco
E66 Incompatible MC
MX pro
Description Motor control is not compatible to the application software
again.
HTSI

Cause After exchanging the motor control, the application software or the control part the versions
do not match.
8 P01 035 EN.01/01

MX eco
E67 Flash fault APP
MX pro
Description Flash Eprom on the applicative defect
Cause An internal EPROM failure occurred.
again.

MX eco
E68 Indus zone fault
MX pro
Description Value for calibration on the application software defect.
again.

MX eco
E69 Eprom fault APP
MX pro
Description EEProm on the applicative defect
again.

37

MX eco
E70 BR - fault
MX pro
Description Shut-down by the thermal mathematical model due to inadmissible high temperature of the
braking resistor.
Cause The parameter settings for the braking resistor are wrong.
Remedy Check the parameter settings.
Cause The connected braking resistor is too small for this application.
Remedy Dimension the resistor according to the real demand. Extend deceleration ramp or cycle
time.

MX eco
E71 Limitation active
MX pro
Description A limitation function of the motor control (current or torque) was active and according to the
setting of E1.17 Reaction at limitation a protective shut-down takes place.
Cause The motor control has recognized a current or torque limitation and parameter E1.17 is set to
"Limitation & trip" or "Limit. & alarm/trip".
Remedy Extend parameter E1.18 "Time Δt".

MX eco
E72 Ramp adaption
MX pro
Description The set acceleration or deceleration ramp cannot be maintained and has been automatically
extended.
Cause Acceleration/deceleration is not possible within the set time due to the mass inertia or the

HTSI
load.
Remedy Extend acceleration/deceleration ramp.
Reduce the load.
Deactivate setting "Extend & trip" of E1.21 "Reaction at deceleration" or extend E1.22 "Time
Δt".
Check whether a braking unit or an active regeneration of energy to the mains is necessary.

8 P01 035 EN.01/01
Activate setting "Motor brake" or "B5.01" of parameter Brake mode "Braking unit".
Cause The set motor data do not correspond with the used motor.
Remedy Check the motor data of M1 (B4.05 .. B4.15) and M2 (B4.17 .. B4.27). Adjust them according
to the table stated in chapter "Motor data", page 7, if necessary and execute autotuning with
B4.03.

MX eco
E73 24V fault
MX pro
Description Problem with the external 24 V buffer voltage
Cause The external buffer voltage fell below 19 V.
Remedy Measure the external buffer voltage and check whether it is overloaded (30 W per inverter).
Cause The 24 V buffer voltage has too strong amplitudes (rectified but not filtered).
Remedy Use a power supply unit with filter capacitor.

38

MX eco
E74 Encoder fault
MX pro
Description An inadmissible high slip, coupling break or loss of the signal has been detected at the
encoder. The detection can be activated by means of parameter D5.06 "Encoder slip
detection".
Cause The mechanic transmission between motor and encoder is damaged.
Remedy Check the mounting of the encoder.
Cause The mechanic fixing of the encoder is damaged and therefrom a slip between motor shaft
and encoder shaft occurs.
Remedy Check the mounting of the encoder.
Cause The connection between encoder and inverter is interrupted or damaged.
Remedy Check the wiring and terminals of the encoder. Check the setting of parameters D5.07 "f-
detection level" and D5.08 "Delay time". Finally execute the routine F2.42 "Test encoder".

MX eco
E75 Encoder test failed
MX pro
Description The encoder test failed (that means a deviation of the motor data > 5 %).
Cause Wrong parameterization of the inverter for testing.
Remedy Check the motor data, encoder data and wiring.
Observe the proceeding described in the "Description of functions" under parameter F2.42.
Cause Hardware failure, wrong algebraic sign due to wrong assignment of channel A and B, wrong
identification of the encoder card or wrong encoder data entered
Remedy Check the whole encoder integration from the mechanic fixing to the set encoder data.
HTSI

MX eco
E76 T-controller at n-limit
MX pro
Description An inadmissible long speed limitation occurred during torque control operation..
Cause Inadmissible underload of the drive occurred and maximum speed has been reached.
8 P01 035 EN.01/01

Remedy Check the application for underload like e.g. belt break and check the parameter settings of
speed limitation (C5.16...C5.19).

MX eco
E77 No motor available
MX pro
Description No motor for prefluxing available (evaluation only in case of brake control).
Cause The connection between inverter and motor is missing.
Remedy Check the motor connection and switching devices between inverter and motor (contactors,
terminals, ...), if existing.

MX eco
E78 Brake fault
MX pro
Description The state of the brake and the confirmation are contradictory.
Cause Crane control is used and the hoist option "Monitor brake feedback" is active under C3.56.
There is no feedback of the brake whether it is closed after a stop command or opened after
a start command.
Remedy Check the functionality of the brake.
Extend the set timeout C3.60.

39

MX eco
E79 Δϕ >> MX pro
Description The monitoring of the rotation angle has detected a too high deviation (determined from nREF
and nACT).
Cause The monitoring of the rotation angle E1.54 is activated and the deviation between nREF and
nACT is higher than the tolerance set with parameter E1.55.
This may occur, for example, due to operation at the current- or torque limitation or when the
drive breaks down.
Remedy Check whether there are mechanical problems at the system like e.g. blocking, belt break or
mechanical overload (I, T, P, t, breakdown of motor).
Increase the permitted tolerance with parameter E1.55.
Extend the ramp times.
Cause The starting torque is not available for 100 %.
Remedy See parameter B3.17 R1 Compensation.
Cause The hoist function is used. In this case the rotation angle monitoring is automatically
activated and cannot be deactivated.
Remedy Set parameter C3.57 Starting torque ↑ and C3.58 Starting torque ↓ to over 100 %.

MX eco
E80 BE11 loss
MX pro
Description The connection between matrix operating panel BE11 and inverter is cut off during active
panel operation and a loss of BE11 control is detected (see parameter E5.12).
Cause The inverter is controlled in panel mode using the operating panel BE11 and the BE11 is
removed or the connection is interrupted. The desired reaction can be set using parameter

HTSI
E5.13.
Remedy Check whether the Matrix operating panel BE11 is proper plugged at the inverter or check
the connection between inverter and BE11 in case of mounting in the cubicle door.

MX eco
E81 VSD overload

8 P01 035 EN.01/01
MX pro
Description Protective shut-down due to exceeding the maximum current/time specification.
Cause Parameter E1.03 "Inverter temp. model" is set to "0 .. Not active".
Remedy Set parameter E1.03 to "1 .. Active".
Check the mechanical system for overload, blocking or the like.
Check the dimensioning of the inverter in principle.

MX eco
E82 I-limit active
MX pro
Description The actual motor current was higher than the actual allowed maximum current (E1.01 Imax1,
E1.02 Imax2, thermal mathematical motor model E2.18...E2.39, thermal mathematical inverter
model E1.03).
This leads to a protective shut-down corresponding to the setting of E1.17 Reaction at
limitation.
Cause An overload of the motor or the system occurred.
Remedy Check the mechanical system for overload, blocking or the like.
Increase the limitation parameters (if permitted).

40

MX eco
E83 T-limitation active
MX pro
Description The actual motor torque was higher than an effective limitation value. Torque-limiting
protective mechanisms are the internal or external torque limitation (E1.05...E1.08) and the
power limitation (E1.13, E1.14).
This leads to a protective shut-down corresponding to the setting of E1.17 Reaction at
limitation.
Cause An overload of the motor or the system occurred.
Remedy Check the mechanical system for overload, blocking or the like.
Increase the limitation parameters (if permitted).

MX eco
E84 Trip within VSD group
MX pro
Description A fault, signalized via the digital input function "Trip within VSD group", has occurred at an
inverter that is connected to the electric shaft
Cause An inverter within the VSD group has shut-down due to a trip and transmits the trip message
by means of the trip message chain.
Remedy The tripping inverter displays another fault (real cause) than "Trip within VSD group"). The
fault has to be eliminated.
Subsequently execute a reset at the master inverter.

MX eco
E85 Position error >>
MX pro
Description
HTSI

Inadmissible high position error when the function "Electric shaft" (C6.69) is active.
Cause The slave has recognized a position error between master and slave that is higher than the
allowed tolerance set with C6.71.
Remedy Deactivate C6.70 Electr. Shaft Monitoring.
Check the mechanical system for blocking, shock loads or the like.
8 P01 035 EN.01/01

Increase parameter C6.71 Allowed error.

MX eco
E86 Sync-Error
MX pro
Description The Sync-signal that is required for the function of the electric shaft is missing (time out:
4 seconds).
Cause The slave does not recognize a synchronization signal.
Remedy Check the connection between master and slave.
Check the setting of the digital inputs and outputs (see Description of functions).

MX eco
E87 Process fault 1
MX pro
Description A process fault is signalized via a digital input command (see E3.65...E3.69).

Cause The function E3.65 is activated but the parameterization or wiring for the terminal "Process
Remedy Check whether a digital input D2.01 .. D2.14 is set to "Process fault 1" and whether the
wiring is correct.
control.

41

MX eco
E88 Process fault 2
MX pro
wiring is correct.
control.

MX eco
E89 Process fault 3
MX pro
wiring is correct.
control.

HTSI
8 P01 035 EN.01/01

42

Defects of the display
The display indicates nothing and the backlight does not light.
Possible cause The operating panel BE11 is not plugged in correctly.
Remedy Ensure that both mechanical interlocks on the side of the operating panel are snapped
in.

The display lights but it indicates unintelligible characters.
Possible cause A wrong operating panel is plugged in.
Remedy Ensure that the Matrix operating panel corresponds with the inverter version.

It is difficult to read the display.
Possible cause The operating panel is exposed to very high or low temperatures.
Remedy The LCD of the operating panel operates best at temperatures between 0...40°C.

For several parameters the display shows no names but only an abbreviation.
Possible cause The version of the BE11 is older than the applicative software.
Remedy Use an appropriate (newest) Matrix operating panel BE11.

The display stops during building up the communication immediately after switch on the +24 V and/or the
mains voltage.
HTSI

Possible cause During installation of the option card pins at the connector are bended.
Remedy Remove the option card and test the user interface without option cards. Try to bring the
pins of the affected option card into one line. If the fault still exists insert a new option
card.
8 P01 035 EN.01/01

At the parameter transfer with the operating panel (short menu) parameters are loaded wrong or the BE11
does not react anymore.
Possible cause Parameters of an inverter with another software version are loaded using E5.05.
Remedy Use E5.04 Copy: MX -> Keypad and E5.05 Copy: Keypad -> MX only for inverters with
same parameter version (see chapter "Software concept", page 64).

43

Other malfunctions
Even there is no trip message it may happen that the inverter does not operate as desired. The cause therefore
is mostly wrong parameter settings or faulty control.
Undesired behaviour and its possible causes that are not based on faults of the inverter are described
following.

The inverter gets a start command and a reference value but the motor does not turn.
Possible cause Only forward or reverse direction is enabled under parameter C2.03 "Direction enable".
Remedy Check the start command on the terminals with C2.03 "Direction enable".

The inverter is not ready and the motor does not turn.
No status display (ready, run or trip) is active.
Possible cause Switching of parameter sets via a digital input is only activated in one parameter set.
Therefrom a permanent switching between the parameter sets takes place.
Remedy Deactivate setting "B2.03" of parameter Parameter mode "Switch-over with DI" or use
the same digital input for switching ("76 .. 2nd parameter set") in both parameter sets.
Possible cause After reset of a fault a start signal is given. But the start signals of "Control source 1"
(E4.01) or "Control source 2" (E4.02) are set to "edge rated".
Remedy Either cancel the start signal and apply it again or adjust the control source to "level
rated".

HTSI
The inverter operates even stationary below the set minimum frequency C2.01.
Possible cause Parameter C2.03 "Direction enable" is set to "3 .. Forward & reverse".
Remedy Enable only one rotational direction with parameter C2.03 "Direction enable".
Adjust the reference signal to the desired minimum value.

8 P01 035 EN.01/01
The braking unit does not work. The inverter fails with "B5.01" although Brake mode "Braking unit" is set
to "4 .. V>> at deceleration" and the braking resistor is connected.
Possible cause The braking resistor is not correctly connected, its resistance is too high or it is defect.
Remedy For devices to MX pro 4V160/200 and MX pro 6V160/200 the resistor has to be
connected to the terminals PA (for MX pro 4V together with the DC link choke DCL) and
PB.
The resistance must be lower than the maximum value stated in the technical data.

The option card cannot be identified.
Possible cause The pins of the connector are bent
Remedy Unplug the option card and check the pins of the connector.

The external "Live Zero" monitoring triggers when there is no voltage on the inverter.
Possible cause The internal burden of AI1, AI2 and AI4 is high-resistance when there is no voltage.
Remedy Use analog input AI3 because it has a fix burden or set analog input AI1, AI2 or AI4 to
0...10 V and connect an external burden of 500 Ω.

The mA reference value cannot be recognized correctly or has undefinable behaviour.
Possible cause The mA driver voltage is > 12 V.
Remedy Ensure that the driver voltage does not exceed the maximum value of 12 V. Also a series
resistor can be used (acts as voltage divider).

44

The motor turns in spite of 0 Hz reference value or oscillates.
Possible cause Wrong parameter setting
Remedy Reduce the slip compensation with B3.18.
Adjust the motor data under B4 according to the name plate data.
Execute autotuning by means of parameter B4.03.
Reduce parameter B3.17 R1 Compensation.

The output frequency is fluctuating although the reference value is constant.
Possible cause Wrong setting of the speed controller
Remedy Reduce B3.20 Dynamic 1 at MX eco and C5.01 Speed prop. gain at MX pro.
If no optimal settings of the controller can be found, use a V/f control method.

The indication "fACT = fREF" is flashing on the display.
Possible cause Unstable control
Remedy Reduce B3.20 Dynamic 1 at MX eco and C5.01 Speed prop. gain at MX pro.

Knocking noises occur in the gear.
Possible cause Unstable control
Remedy Let the drive free-wheeling starting from nominal speed. If the noises do not occur
HTSI

thereby, proceed as follows:
Reduce B3.20 Dynamic 1 at MX eco and C5.01 Speed prop. gain at MX pro.
8 P01 035 EN.01/01

During starting mechanical shock load occur.
Possible cause Steep starting ramp
Remedy Set a gentle starting using parameters C2.12 S-ramp mode and C2.13 S-ramp.

The motor exceeds pull out torque at high starting load.
Possible cause Acceleration is too low
Remedy Deactivate S-ramp mode with parameter C2.12.

The indication of acceleration/deceleration at the keypad does not correspond with the actual speed.
Possible cause The indication of acceleration/deceleration does not derive from the actual value but
from the internal integrator. Therefore the indication of acceleration/deceleration differs
e.g. at automatic ramp extension due to high moments of inertia.
Remedy Extend the ramp times in such a way as no automatic ramp adaptation takes place.
Set parameter A6.05 Limitations to "1 .. visible" in order to enable recognition of the
occurring limitation.
Set parameter E1.23 Ref. after dec. extension to "1 .. Dec. at ramp".

At speed feedback the motor does not turn more than approx. 2 Hz.
Possible cause The rotary field of the motor or the encoder lines may be exchanged. In this case also
parameters C2.04 Phase rotation and D5.04 Encoder rotation have to be adjusted
appropriate.
Remedy Check the rotary field of the motor as well as parameter C2.04 Phase rotation.
Check the wiring of the encoder and parameter D5.04 Encoder rotation.

45

"Safe Standstill" leads to a trip message.
Possible cause The inverter is operated in simulation mode (F2.45).
Remedy Do not use the PWR input during simulation mode.

The motor turns unstable (applies to powers ≤ 90 kW).
Possible cause An IGBT of the inverter is defect.
Remedy Measure the output current of all 3 phases and check them for symmetry.

The inverter does not start despite Ready display and start signal (only for 12-pulse devices).
Possible cause A 12-pulse device (from MX eco 4V500 and MX pro 400/500) is only supplied by the
mains connections L1.2, L2.2 and L3.2 e.g. for temporary operation.
Remedy Supply the inverter by the mains connections L1.1, L2.1 and L3.1.
The inverter can be supplied by Lx.1 or Lx.2 from following software:
APSeco_B03_8783482_04_V04.00a and APSpro_B03_8783483_04_V04.00a

The inverter stops with "Stop".
Possible cause The PWR input was interrupted for short-term, e.g. due to control by means of a safety
PLC
Remedy The PWR input must only be supplied by the internal 24V of the inverter!
Check whether short interrupts of the PWR circuit occur.

HTSI
"Catch on the fly" does not work.
Possible cause Parameter B3.37 Remanence level is set too high.
Remedy Decrease the value of parameter B3.37. The smaller the remanence of the motor the
smaller the value for the "Catch on the fly" level has to be adjusted.

8 P01 035 EN.01/01
F2.40 Start IGBT test achieves a positive result without motor.
Possible cause There is no motor but a sinus filter connected at the inverter output.
Remedy The IGBT test can be executed successfully even with a sinus filter. Anyway, always a
motor should be connected for the IGBT test.

B5.01 Brake mode motor brake A, B, C achieves no difference.
Possible cause For MX eco & pro devices to motor control version V1.1 and for all devices up to 75 kW
motor brake A, B and C are similar.
Remedy If the braking power of the motor brake is insufficient, an external braking resistor can be
used for MX pro.

Reset via bit 7 Profibus does not work but via operating panel BE11 it works.
Possible cause The bus is only used for the f-reference value. Control takes place by source 1 with 2-
wire-edge at the terminals. Thus bits 0...9 are not effective according to Profidrive profile
and therefrom no reset with bit 7 can be executed.
Remedy Use the bus also for control.
Or use a free bit (11...15) via a time module in the logic blocks (parameter group E6) that
is parameterized to the function "Ext. reset".

Display of the alarm message "Tmax motor" or "Tmax generator".
Possible cause A new operating panel BE11 is used in combination with an old inverter. Both messages
have been merged to the message "T limitation".
Remedy Interpret "Tmax motor" and "Tmax generator" as "T limitation".

46

Alarm message I- or T-limitation is displayed without motor.
Possible cause The inverter is operated in a VC mode without motor.
Remedy Always use a V/f control method (B3.02) when there is no motor connected.

Operation without motor
Possible cause The operation of the inverter without motor is only possible with control method V/f (and
even in this case not suggestive!). With VC modi malfunction or illogical acting limitations
may occur.
Remedy For test run of a drive with very small motor or without motor (e.g. cubicle assembly)
parameter F2.49 Test mode is available which automatically switches to V/f mode and
deactivates the monitoring of the motor phases.
In this case functions must not be used which are not allowed in V/f mode (e.g. T-
controller, speed feedback, crane control, ...).

High starting torque cannot be reached.
Possible cause Field orientation is available from speed zero to nominal slip after magnetization only for
the period of the rotor time constant!
Remedy Observe following for drives with high starting torque:
− In case of long acceleration ramps or keeping reference value zero, the starting
torque decreases notedly → set short ramp, possibly switch-over to 2nd ramp
− Set parameter B3.17 R1 Compensation sensitive higher up to 100 % (factory setting
is 80 %).
HTSI

− Using an encoder solves the problem of the field orientation at n = 0 but the displayed
actual torque value is considerably worse than in case of operation without encoder
(affects only the display, torque is present). Additionally, S-ramps have a negative
effect !
8 P01 035 EN.01/01

47

The drive oscillates or turns unstable.
Possible cause A motor parameter has been adjusted after autotuning.
If a motor parameter is adjusted even marginal after autotuning, the factory motor data
are loaded.
Remedy Enter the motor data again and execute autotuning.
Possible cause The settings of the n-controller have not been adapted.
Each system is designed individually and has different behaviour, so each system has to
be adapted empirically on-site.
Remedy Reduce the magnification of the n-controller by approx. 30 % (parameter C5.01 for MX
pro and B3.20 for MX eco).
Increase the integration time of the n-controller by approx. 30 % (parameter C5.02 for
MX pro and B3.21 for MX eco).

If the existing moment of inertia of the drive system is known (mass inertia of the motor
and the load), the optimal magnification of the n-controller can be calculated as follows:
1. Calculation of the existing total moment of inertia IReal = IMotor + ILoad (a reduction of I to
n-motor may be necessary)
2. Read out the moment of inertia of the load IVSD which is calculated by the inverter
(parameter A2.28, available from software version B05_07 for devices > 75 kW)
If parameter A2.28 is not available, the value can be calculated as follows:
B4.06 (Nom. motor current) B4.11(Motor no. of poles)
IVSD = ITable × ×
F1.03 (Nom. inverter current) 4

HTSI
MX pro 4V MX pro 4V
MX eco 4V MX pro 6V kgm² MX eco 4V MX pro 6V kgm²
0.75 0.75 0.0018 90 − 0.70
1.5 1.5 0.0039 110 90/110 0.70
2.2 2.2 0.0039 132 110/132 1.00

8 P01 035 EN.01/01
3 3 0.0051 160 132/160 1.20
4 4 0.0062 200 160/200 1.40
5.5 5.5 0.0177 250 200/250 1.60
7.5 7.5 0.024 315 250/315 2.60
11 11 0.039 400 315/400 3.20
15 15 0.047 500 400/500 6.00
18.5 18.5 0.085 630 500/630 7.00
22 22 0.098 − 630/800 13.00
30 30 0.151
37 37 0.23
45 45 0.28
55 55 0.75
75 75 1.28

This calculation for the moment of inertia of the load IVSD does not apply to
synchronous motors ! For synchronous motors the moment of inertia of the load has
always to be read out in parameter A2.28.

3. Calculation of the n-magnification
Jreal
n - Reglerverstärkung =
JFU

MX pro: calculated value x 40 complies with parameter C5.01 in %
MX eco: calculated value complies with parameter B3.20

48

Unsatisfactorily multi-motor operation
Possible cause Wrong settings at the inverter.
Remedy Check the settings of the inverter and adjust them accordingly:
− Motor current and power has to correspond with the sum of the individual motors
− The setting of the n-controller has to be related to the sum of all centrifugal masses
(caution: many small motors have a notedly smaller centrifugal mass than a bigger
motor)
Possible cause The motors are not coupled or unequal.
Remedy Use a V/f control method.
Possible cause The motors are equal and mechanically coupled.
Remedy Execute autotuning.
Both a V/f control method and VC standard and enhanced can be used.
Possible cause The motors have different starting torques.
Remedy Avoid different cable lengths.
HTSI
8 P01 035 EN.01/01

49

Hardware diagnostics

Overview of the components
Abbreviation Designation Description
ACB Active capacitor balancing Active voltage splitting
APP Application board User interface including the device Software
BUD Braking unit driver Braking unit driver
FCB Fan control board Fan control card
GD Gate driver IGBT driver card
ISL Internal serial link Internal bus link between APP and MC
TB Measuring board Measurand indication
MC Motor control Motor control
PB Power board Power board
RFI RFI board EMC-filter
RFS Rectifier snubber board Rectifier snubber circuit
SCB Soft charge board Charging circuit

HTSI
Diagnostic LEDs
All >pDRIVE< MX eco & pro have a red LED (LED1) for indication of the DC link voltage. This LED can be

8 P01 035 EN.01/01
observed from the outside of each device and indicates the charging state of the DC link and the auxiliary DC
link for the charging circuit. It lights when the DC link voltage is higher than 60 V DC.

The position of LED 1 is shown in the design drawings in chapter "Plans", page 69.

From devices >pDRIVE< MX eco 4V160, >pDRIVE< MX pro 4V132/160 and MX pro 6V90/110 there are
additional LEDs on the PCBs for simple diagnostics and troubleshooting that show the proper voltage supply
of the different modules.

50

Overview of the built-in LEDs

400 V devices

>pDRIVE< MX eco
4V160 4V200, 4V250 4V355, 4V400
4V315 4V500, 4V630
>pDRIVE< MX pro
4V132/160 4V160/200 4V315/400
Ref. 4V200/250 4V400/500
Voltage supply Voltage potential 4V250/315 4V500/630
MB11, A1 PB12_13, A1 PB14_15, A1
DC link voltage (>60V) - DC-linkminus LED 1 LED 1 LED 1
PS for FCB A70/A71 +15 V DC L LED 2 LED 2 LED 2
PS for applicative A10/A11 +24 V DC M1 LED 3 LED 3 LED 3
PS for internal fans M10-M13 -24 V DC M1 LED 4 LED 4 LED 4
Current transformer + +15*/24 V DC DC-linkminus LED 5* LED 5 LED 5
Current transformer - -15*/24 V DC DC-linkminus LED 6* LED 6 LED 6
PS for motor control +5 V DC DC-linkminus LED 7 LED 7 LED 7
PS for soft charge board A6/A61 +15 V DC DC-linkplus − LED 8 LED 8
PS for soft charge board A60 +15 V DC DC-linkplus − − LED 9
PS for braking unit driver A20 +15 V DC DC-linkplus − LED 9 −
PS for braking unit driver A20 -15 V DC DC-linkplus − LED 10 −
HTSI

PB11, A2
PS for soft charge board A6/A61 +15 V DC DC-linkplus LED 8 − −
PS for soft charge board A60 +15 V DC DC-linkplus − − −
BUD 14_15 I,
A20
8 P01 035 EN.01/01

Overtemperature fan BU (Matrix) − L − − LED 10
PS for braking unit driver A20 +24 V DC M3 − − LED 11
PS for braking unit driver A20 -24 V DC M3 − − LED 12
External braking unit connected +10 V DC M3 − − LED 15
BUD 14_15
(ext.)
External braking unit +24 V DC DC-linkminus − − LED 13
External braking unit -24 V DC DC-linkminus − − LED 14
FCB, A7 FCB, A7 FCB, A70
Overtemperature fan (Matrix) − L LED 1 LED 1 LED 1
FCB, A71
Overtemperature fan (Matrix) − L − − LED 1

Reference potential of the respective voltage supply:
L … Mains (internal or external)
Mx … floating ground

51

690 V devices

>pDRIVE< MX pro
6V90/100 6V200/250 6V400/500
6V110/132 6V250/315 6V500/630
Ref. 6V132/160 6V315/400 6V630/800
Voltage supply Voltage potential 6V160/200
MB11, A1 MB13V, A1 MB15V, A1
DC link voltage (>60V) - DC-linkminus LED 1 LED 1 LED 1
PS for FCB A70/A71 +15 V DC L LED 2 LED 2 LED 2
PS for applicative A10/A11 +24 V DC M1 LED 3 LED 3 LED 3
PS for internal fans M10-M13 -24 V DC M1 LED 4 LED 4 LED 4
Current transformer + +15*/24 V DC Ud0 LED 5* LED 5 LED 5
Current transformer - -15*/24 V DC Ud0 LED 6* LED 6 LED 6
PS for motor control +5 V DC Ud0 LED 7 LED 7 LED 7
PS for braking unit driver A20 +15 V DC M3 − LED 11 −
PS for braking unit driver A20 -15 V DC M3 − LED 12 −
PB11V, A2 PB13V, A2 PB15V, A2
PS for soft charge board A6/A61 +15 V DC DC-linkplus LED 8 LED 8 LED 8
PS for soft charge board A60 +15 V DC DC-linkplus − − LED 9
RFI board, A30
Overtemperature fan BU (Matrix) − L − LED 10 −
BUD13V I, A20 BUD14_15V I, A20

HTSI
Overtemperature fan BU (Matrix) − L − − LED 10
PS for braking unit driver A20 +24 V DC M3 − LED 11 LED 11
PS for braking unit driver A20 -24 V DC M3 − LED 12 LED 12
External braking unit connected +10 V DC M3 − LED 15 LED 15
BUD 14_15 BUD 14_15

8 P01 035 EN.01/01
(ext.) (ext.)
External braking unit +24 V DC DC-linkminus − LED 13 LED 13
External braking unit -24 V DC DC-linkminus − LED 14 LED 14
FCB, A7 FCB, A7 FCB, A70
FCB, A71

Reference potential of the respective voltage supply:
L … Mains (internal or external)
Mx … floating ground

The LEDs are designed in SMD and therefrom they are difficult to find when they do not light. Detailed
device drawings with emphasized position of the LEDs and connectors are given in chapter "Plans",
page 69.

LEDs do not supersede voltage measurement because a LED that does not light could be also
defective !

52

Troubleshooting with the aid of LEDs

Basically all LEDs must light when the device has no trip.
Exceptions are: LED 1 on the fan control board(s) FCB and LED 15 on the braking unit driver.

If a LED does not light, this might have following reasons:
• The voltage supply of the respective module is faulty or defect.
• The voltage supply of the respective module is overloaded.
• The LED itself is defect.

Connectors must be unplugged only when there is no voltage.
The plugs of the current transformers must be unplugged only when there is no motor connected.

Please proceed according to the following table for further troubleshooting.

LED Function Fault cause and remedy
From MX eco 4V160, MX pro 4V132/160 and MX pro 6V90/110:
LED 1 Indicates the charging state of the DC link and Check the mains connections and mains fuses.
the auxiliary DC link for the charging circuit (> 60 All three phases L1, L2 and L3 must be applied
V DC) with mains voltage.
HTSI

LED 2 Indicates the voltage supply for the fan control Unplug the fan plug(s) X3/X11...X14
board(s) successively. If the LED lights afterwards, a fan
is defect (also see below: LED pattern of the fan
control boards).
LED 3 Indicates the voltage supply of the control part Disconnect the power supply and pull off the
plug X4. Connect power supply again. If the LED
8 P01 035 EN.01/01

lights afterwards, the control part is defect.
LED 4 Indicates the voltage supply of the internal fan(s) Check whether the fans are mechanically
M10, M11, M12, M13 of the control part blocked.
Unplug the fan plug(s) X30...X33 successively.
If the LED lights afterwards, a fan is defect.
LED 5 Indicates the voltage supply of the current Check whether the current transformers are
LED 6 transformers T1, T2, T3 mechanically damaged and also check their
connection cable.
LED 7 Indicates the voltage supply of the motor control If LED 7 does not light, the power board and the
board control block must be exchanged.
LED 8 Indicates the voltage supply of the soft charge If LED 8 does not light, the power board (A1 or
board(s) A2) and the soft charge boards (A6, A60, A61)
must be exchanged.

53

LED Function Fault cause and remedy
For MX eco 4V200...4V315 and MX pro 4V160/200...4V250/315:
LED 9 Indicates the voltage supply of the braking unit Check the inverter.
LED 10
For MX eco 4V200...4V315, MX pro 4V160/200...4V250/315 and MX pro 6V200/250...630/800:
LED 9 Indicates the voltage supply of the second soft Check the inverter.
charge board
LED 10 Monitors the fan of the external braking unit Check whether the external braking unit is
proper connected to the inverter.
LED 11 Indicates the internal voltage supply of the Check the inverter.
LED 12 braking unit
LED 13 They are inside the external braking unit and Check whether the external braking unit is
LED 14 indicate the voltage supply. proper connected to the inverter.
LED 15 Indicates the connection of the control lines to Check whether the control line of the braking
the external braking unit. unit is proper connected to the inverter.
When no external braking unit is connected, this
LED does not light !

Before any work at the inverter disconnect the frequency inverter from the mains, wait until the DC link
is discharged and check whether there is no voltage anymore!!

defective !

HTSI
8 P01 035 EN.01/01

54

LED pattern of the fan control boards
Depending on the inverter power, devices from MX eco 4V160, MX pro 4V132/160 and MX pro 6V90/110 are
designed with one to four power part fans. Two fans con be controlled by a fan control board FCB A70, A71.
Each FCB is provided with LED 1 and LED 2 for thermal monitoring of the power part fans.
At devices from >pDRIVE< MX eco 4V132 and >pDRIVE< MX pro 4V110/132 the fans are supplied by the
mains from the inverter as factory default. However, external voltage supply is possible.
At devices from >pDRIVE< MX pro 6V90/110 voltage supply takes place via the optional transformer box or an
external voltage supply.

If the external voltage supply fails, the LEDs are not supplied and remain dark.

If voltage supply is present, the respective LEDs light when the thermostat relays of the fan are alright (closed).
If a thermostat relay triggers, a "LED pattern" according to the following table arises by which the triggered fan
can be easily found.

LED pattern BUD_I
>pDRIVE< Fan
FCB A7 / A71 FCB A70 A20 *)
MX eco MX pro 4V MX pro 6V M2 M1 M4 M3 BU LED1 LED2 LED1 LED2 LED10
4V160 4V132/160 6V90/110 m
4V200 4V160/200 6V110/132
6V132/160
6V160/200 ϑ>> m m

4V250 4V200/250 6V200/250
HTSI

4V315 4V250/315 6V250/315
6V315/400 ϑ>> m
without
option ? ϑ>> m m
BU 6V4500
4V355 4V315/400
8 P01 035 EN.01/01

4V400 4V400/500 ϑ>> m m
4V500 without ? ϑ>> m m m
option
BU 4V750 ? ? ϑ>> m m m m
4V630 4V500/630 6V400/500
without 6V500/630 ϑ>> m
option 6V630/800
? ϑ>> m m
BU 4V750 without
option ? ? ϑ>> m m m
BU 6V900 ? ? ? ϑ>> m m m m
6V200/250
6V250/315
6V315/400
with option ? ? ? ? ϑ>> m m m m m
BU 6V450
4V315/400 6V400/500
4V400/500 6V500/630
4V500/630 6V630/800
with option with option ? ? ? ? ϑ>> m m m m m
BU 4V750 BU 6V900

*) At MX pro 6V200/250...6V315/400 LED10 is located on the RFI board A30.

… Fan alright
ϑ>> … Overtemperature of the fan
? … State not identifiable until troubleshooting
… LED lights
m … LED dark

55

Fuses

Fuses F1... F3
The fuses F1...F3 are located on the RFI board (A30 / A40) and protect the varistors at the input.
Simultaneously several auxiliary voltages are created behind the fuses F1...F3, from there the inverter cannot
build up electronic supply when the fuses are defect.

Fuses FU1...FU3 (AC fans)
The fuses FU1...FU3 are located on the fan control board(s) (A6 / A60 / A61) and provide a short-circuit
protection for the fans. When the fuses are defect, the fans do not operate and the control part is not cooled
any longer !

After replacing defect parts the cause of breakdown must be found. Switching on again without
eliminating the cause of fault may even enlarge the dimension of damage !

HTSI
8 P01 035 EN.01/01

56

Measurement of power semiconductors


When measuring the power part, we recommend the following proceeding in order to avoid faulty
measurements:
• Disconnect the mains and motor lines
• Measure the diodes, thyristors and IGBTs with a universal measuring instrument with diode test function
and applied current.

In case of this measurement the absolute values are not decisive because they heavily depend on the
used measuring instrument. The consistency of the measured values is the determining factor. Please
observe furthermore that the measuring instrument needs some time to charge the DC link capacity.

Rectifier measurement

>pDRIVE< MX eco & pro inverters up to 18 kW consist of a 6-pulse diode rectifier bridge. The diodes are
measured between the input terminals L1, L2, L3 and the plus or minus DC link busbar PA/+, PC/-.
The frequency inverters >pDRIVE< MX eco 4V22...4V400, >pDRIVE< MX pro 4V22...4V315/400 and
HTSI

6V2,2/3,0...6V315/400 consist of a 6-pulse half controlled rectifier bridge with thyristors.
The frequency inverters >pDRIVE< MX eco 4V500...4V630, >pDRIVE< MX pro 4V400/500...4V500/630 and
6V400/500...630/800 consist of a 12-pulse half controlled rectifier bridge with thyristors.
The diodes are measured between the input terminals L1, L2, L3 (or L1.1, L1.2, L2.1, L2.2, L3.1, L3.2) and the
minus DC link busbar PC/-. The thyristors are measured between the input terminals L1, L2, L3 (or L1.1, L1.2,
L2.1, L2.2, L3.1, L3.2) and the plus DC link busbar PA/+.
8 P01 035 EN.01/01

The gates of the thyristors can be directly checked at the plugs (black/yellow, black/green, black/violet) of the
soft charge board A6, A60 and A61.
The values are normally in a range of 10...20 Ω. 0 Ω or values > 50 Ω indicate a defect of the thyristor. In this
case the thyristors and the soft charge board have to be exchanged.

57

IGBT measurement

The IGBTs are measured between the motor terminals U, V, W and the plus or minus DC link busbar PA/+,
PC/-.

In case of a defect IGBT the module is rather infrequently defective because the control electronics
reacts very fast and thus prevents mechanical destruction. Therefrom a measurement is absolutely
necessary for assessment.

The gates of the IGBTs cannot be checked when the module is built-in!

HTSI
8 P01 035 EN.01/01

58

Measurement of IGBTs when the device is energized

Measurements at live parts must be done only by duly qualified and trained staff !!
The measuring devices used have to comply with CAT III or IV.
Maximum voltage: 690 V AC and 1000 V DC !!

For >pDRIVE< MX pro 6V the rectifier IGBTs can be checked as follows:
Measure the voltages between the motor phases U, V, W against Vd0 (is not earth potential) when the inverter is
applied with voltage (DC link charged), impulse inhibit is active and the motor is disconnected. From MX pro
6V90/110 the potential Vd0 applies on plug X101 inside the device.

Mains voltage
500 V 690 V
approx. approx.
VDC
700 V 960 V
approx. approx.
VDC/2
350 V 480 V
HTSI

When all three measured voltages are approximately zero, there is no IGBT fault.

When approximately the half DC link voltage is measured, it points out a defect of the respective motor phase.
8 P01 035 EN.01/01

Positive voltages → failure in the positive bridge section
Negative voltages → failure in the negative bridge section

Possible cause of defect can be the motor control, the driver card or the IGBT.

59

Checking the current transformers
The current transformers are checked when the inverter is supplied by the mains and the rectifier is locked
("Stop", "Lock"). LED 5 and LED 6 on the measuring board A1 are checked first (see chapter "Diagnostic
LEDs", page 50 and "Plans", page 69). These two LEDs show whether the positive and negative voltage supply
of the current transformers is existing.
Afterwards all 3 terminals of the current transformer are measured against supply ground of the current
transformers.

The measuring devices used have to comply with overvoltage category CAT III or CAT IV according
IEC 61010!

The supply ground of the current transformers is for all MX eco 4V and MX pro 4V devices DCminus
(negative DC link)!
Up to MX pro 6V75/90 the ground of the current transformers is also DCminus, for devices from MX pro
6V90/100 the ground of the current transformers is Vd0 (DC link centre)!

The current transformers must be always supplied when current flows through.

For measuring the current transformer extra small test probes are required. For example, "TP2 slim
reach test probes" of Fluke can be used.

HTSI
For MX eco 4V160, MX pro 4V132/160 and MX pro 6V90/110...6V160/200 the connections of the current
transformer are simply measured at the connector X11 on the measuring board A1.
For all 4V devices the screen plate of the motor control can be used as DCminus potential.
For all 6V devices the test point X101 can be used as Vd0 potential.

8 P01 035 EN.01/01
Reference potential for MX eco/pro 4V
MC – screen plate potential DCminus

Reference potential for MX pro 6V
X101 - Potential Vd0

Connector X11 Connector X11

60

From MX eco 4V200, MX pro 4V160/200 and MX pro 6V200/250 simply measure directly at the connectors of
the current transformers.
For all 4V devices the screen plate of the motor control can be used as DCminus potential.
For all 6V devices the test point X101 can be used as Vd0 potential (.position of X101 see chapter "Plans", page
69).

Color: yellow for T1 / phase U
green for T2 / phase V
violet for T3 / phase W

All three connections of the current transformers are measured towards the respective ground of the current
transformer DCminus or Vd0.

The supply of the current transformers has to be at least ± 13.3 V for MX eco 4V160, MX pro 4V132/160 and
MX pro 6V90/100...6V160/200.
The supply of the current transformers from MX eco 4V200, MX pro 4V160/200 and MX pro 6V200/250 has to
be at least ± 21.3 V.
HTSI

Following pictures apply for the current transformer signal:
8 P01 035 EN.01/01

Current transformer defective:
If the measuring signal of the current transformer is not constant at
0V, the current transformer is defect and has to be replaced.

Current transformer alright:
The measuring signal of the current transformer is constant at 0V.

61

Insulation measurement
All frequency inverters from >pDRIVE< MX eco 4V160, MX pro 4V132/160 and MX pro 6V90/100 are tested
regarding voltage resistance and insulation resistance according to EN 50178 (test voltage: 2.8 kV DC for MX
eco 4V & MX pro 4V, 3.4 kV for MX pro 6V). When measuring the insulation resistance for this devices (e.g. in
case of inspection) unconditionally pay attention to following points:
1. Short-circuit all power terminals of the inverter (L1, L2, L3, U, V, W, PO, PA/+, PB, PC/-).
2. Disconnect the internal RFI-filter, i.e. the screw on the RFI-board has to be removed (position of the
screw see chapter "non-grounded mains" in the mounting instructions).
3. Carry out the measurements of the insulation resistance only between the short-circuited power
terminals and ground.
4. Test voltage: MX eco 4V & MX pro 4V: max. 2 kV DC
MX pro 6V: max. 3.11 kV DC
5. Before measuring the insulation resistance of the motor, the motor has to be safely separated from the
inverter either by disconnection or by opening the motor contactor. Non-observance leads to damage of
the inverter !

Do not carry out insulation resistance measurements at the control terminals !!!

Voltage levels

HTSI
When checking diverse operating states it might be important to know the different voltage levels of the
inverter. In the table all relevant values are given.

8 P01 035 EN.01/01
Voltage levels 400 V

VDC link VMains AC
(= VDC link /
√2) Description
825 V 583 V Overvoltage shut-down
1)
785 V 555 V Switch-on value of braking unit
770 V 544 V Switch-on value of autoramp function (without braking unit)
756 V 535 V Overvoltage shut-down during charging process
3)
750 V 530 V Limit for overvoltage reset
747 V 528 V Equivalent to 480 V +10 %
630 V 2)
445 V Intelligent rectifier >pDRIVE< LX active @ 400V Specified range of mains
570 V 2)
403 V >pDRIVE< LX "Recognition of undervoltage" @ 400V voltage and DC link
566 V 400 V Equivalent to 400 V voltage
456 V 323 V Equivalent to 380 V -15 %
430 V 304 V Charging circuit closed, undervoltage ride through level
360 V 255 V Undervoltage shut-down (charging circuit active)
~170 V ~120 V Supply of electronics active

1)
Adjustable from 660...785 V with B5.02 "BU-braking level", depending on the mains voltage set with
parameter B3.01.
2)
Value depends on the set mains voltage
3)
VDC link must drop below this value so that reset is possible

62

Voltage levels 690 V

VDC link VMains AC
(= VDC link /
√2) Description
1174 V 830 V V> switch-off
1)
1127 V 797 V Switch-on value of braking unit to 75/90 kW
1100 V 778 V Switch-on value of autoramp function (without braking unit)
1087 V 769 V V> switch-off during charging process
1)
1080 V 764 V Switch-on value of braking unit from 90/110 kW
3)
1078 V 762 V Limit for overvoltage reset
1078 V 2)
762 V Intelligent rectifier >pDRIVE< LX active @ 690V
1073 V 759 V Equivalent to 690 V + 10 %
1020 V 2)
721 V >pDRIVE< LX "Recognition of undervoltage" @ 690V
976 V 690 V Equivalent to 690 V Specified range of mains
voltage and DC link
849 V 600 V Equivalent to 600 V voltage
707 V 500 V Equivalent to 500 V
601 V 425 V Equivalent to 500 V - 15%
572 V 404 V Charging circuit closed, undervoltage ride through level
488 V 345 V V< switch-off (charging circuit active)
~170 V ~120 V Supply of electronics active
HTSI

1)
Adjustable from 850...1080/1127 V with B5.02 "BU-braking level", depending on the mains voltage set with
parameter B3.01.
2)
Value depends on the set mains voltage
3)
VDC link must drop below this value so that reset is possible
8 P01 035 EN.01/01

Measuring points for the DC link voltage
The DC link voltage can be simplest measured at the power terminals PA/+ and PC/-.
The position of the DC link connection can be found in the drawings in chapter "Plans", page 69.

63

Software concept
The frequency inverters >pDRIVE< MX eco & pro contain several microprocessors and thus they contain
different software programs.
Basically, there are 3 programs:
• Applicative software
• Motor control software
• Software of the Matrix operating panel BE11
When the inverters are delivered, they contain the latest software versions which are compatible to each other.

The applicative software is the program for controlling the behaviour of the inverter. It contains all adjustable
parameters and it processes all inputs and outputs as well as all open and closed loop tasks.
The software version is readable with parameter F1.07 "APP software" and is composed as follows:

APSpro - A 02 - 11

Software version
Parameter version
Parameter family
Type of program

HTSI
Type of program defines the die product line >pDRIVE< MX eco or >pDRIVE< MX pro
Parameter family Capital letter starting with A Versions with equal family index can be updated simply
because there are no changed parameters which would change the functionality or factory
setting. If new parameters are added, they have a neutral factory setting or they are
inactive.
Parameter version Defines the version within the parameter family.

8 P01 035 EN.01/01
Software version Defines the software version and is increased when the application program or the
parameter version is changed.

The Motor control software contains the program for controlling the motor and software functions near the
motor. The software version is readable only for service technician in service parameter F5.44 "Actual SW
MC".

The software of the Matrix operating panel BE11 contains the program for indication on the display and the
different language versions (details of the language versions can be found in the catalogue, chapter "Options").
The software version is readable only for service technician in service parameter F5.50 "Software BE11".
The latest version of BE11 also works with all older applicative-versions overall parameter families.

An older BE11 can be also used with a newer inverter (i.e. with newer applicative-software). New
parameters are only indicated as a symbol and not with text.

64

Spare part concept
All >pDRIVE< MX eco & pro up to 18.5 kW have a compact power part and therefrom they are typically
replaced as a whole. Exceptions are the operating panel BE11, option cards used and fans.
From 22 kW the devices are designed in such a way, that service can be done on module level.
The proper spare parts are given separately in the spare parts list.

0.75 18.5 22 75 90 800 kW
Repair Exchange of control part
Control part uneconomical or exchange device

Fans All fans can be exchanged

Options All option cards are plugged in and can be exchanged

Repair Exchange device Exchange device with
Power part uneconomical “Exchange Tool”
HTSI

For the >pDRIVE< MX eco & pro products all components are available as spare parts excepting those parts
marked as "uneconomical" in the gray field.

For warranty claims it is always necessary to fill out a "Warranty Report" (see chapter "Warranty
Report", page 115).
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Training concept
Because of many years of experience with development, production and sale of frequency inverters our
company has achieved substantial know-how. These experiences in the area of dimensioning, start-up and
applications enable our company to provide professional trainings regarding frequency inverters for our
customers.

As the applications of frequency inverters are multifarious, also the previous knowledge and experiences of our
customers differ. Therefore we provide customer-related trainings harmonized with the customer needs.
It can be chosen from several modules:
• What is a frequency inverter and how does it work ?
• Dimensioning of >pDRIVE< MX eco & pro frequency inverters in consideration of the application
• Simple start-up of >pDRIVE< MX eco & pro frequency inverters
• Special functions of >pDRIVE< MX eco & pro frequency inverters und their commissioning
• Bus systems for >pDRIVE< MX eco & pro frequency inverters
• Service, trouble shooting and repair of >pDRIVE< MX eco & pro frequency inverters

Ask your contact person - he will be glad to offer you a customized training!

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Reference value distributor

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Summary of limitations

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Plans
On the following pages you find circuit diagrams of the >pDRIVE< MX eco & pro from 132...630 kW
(MX pro 6V: 90...800 kW). Furthermore we provide design drawings with emphasized position of the most
important components and diagnostic LEDs.

Note for LED1:
LED 1 indicates the DC link voltage. It can be observed from the outside of each device (also see chapter
"Diagnostic LEDs", page 50). Depending on the power the LED is placed different.

0.75...18 kW 22...75 kW from 90 kW
HTSI

The diagnostic LEDs are built-in from >pDRIVE< MX eco 4V160, >pDRIVE< MX pro 4V132/160 or.
>pDRIVE< MX pro 6V90/110.
These LEDs are designed in SMD and therefrom they are difficult to find when they do not light. So
whose position is specially emphasized in the design drawings.
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defective !

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Circuit diagram MX eco 4V90 and 4V110 as well as MX pro 4V90/110

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Circuit diagram MX eco 4V132 as well as MX pro 4V110/132
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Design drawing MX eco 4V160 as well as MX pro 4V132/160
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A1 ............ Measuring board T1...T3 ........ Current transformer
A3 ............ Motor control F1...F3 ........ Fuses on the RFI board
A6 ............ Soft charge board FU1...FU3 ... Fuses on the fan control board
A7 ............ Fan control board M1 .............. Power part fan
A30 .......... Filter board M10 ............ Control part fan

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A1 ............ Power board T1...T3 ........ Current transformer
A7 ............ Fan control board M1 .............. Power part fan
A30 .......... Filter board M10 ............ Control part fan

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Circuit diagram MX eco 4V200 and MX pro 4V160/200

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Design drawing MX eco 4V250 and 4V315 as well as MX pro 4V200/250 and 4V250/315
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A7 ............ Fan control board M1, M2 ....... Power part fan
A20 .......... Braking unit interface M10, M11 ... Control part fan
A30 .......... Filter board

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Circuit diagram MX eco 4V250 and 4V315 as well as MX pro 4V200/250 and 4V250/315

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Circuit diagram MX eco 4V250 and 4V315 as well as MX pro 4V200/250 and 4V250/315
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Design drawing MX eco 4V355 and 4V400 as well as MX pro 4V315/400
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A60 .......... Soft charge board FU1...FU3 ... Fuses on the fan control board
A70, A71 ... Fan control boards M1...M3 ...... Power part fan
A20 .......... Braking unit interface M10 ...M12 ... Control part fan

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A60, A61 ... Soft charge boards FU1...FU3 ... Fuses on the fan control board
A30, A40 ... Filter boards

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A60, A61 ... Soft charge boards FU1...FU3 ... Fuses on the fan control board
A30, A40 ... Filter boards

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Design drawing BU 4V750
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A1 ............ Braking unit driver M1 ............ Power part fan

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Circuit diagram BU 4V750

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Design drawing MX pro 6V90/110...6V160/200
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A1 ............ Power board T1...T3, T20 ... Current transformer
A3 ............ Motor control F1...F3 ........... Fuses on the RFI board
A6 ............ Soft charge board FU1...FU3 ...... Fuses on the fan control board
A7 ............ Fan control board M1 ................. Power part fan
A30 .......... Filter board M10 ............... Control part fan

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Circuit diagram MX pro 6V90/110...6V160/200

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A2 ............ Measuring board F1...F3 ........ Fuses on the RFI board
A3 ............ Motor control FU1...FU3 ... Fuses on the fan control board
A6 ............ Soft charge board M1, M2 ....... Power part fan
A7 ............ Fan control board M10, M11 ... Control part fan
A21 .......... Snubber board

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A1 ............. Power board A31 .............. Gate drive
A2 ............. Measuring board A41 .............. Active capacitor balancing
A3 ............. Motor control T1...T3 ......... Current transformer
A6 ............. Soft charge board F1...F3 ......... Fuses on the RFI board
A7 ............. Fan control board FU1...FU3 .... Fuses on the fan control board
A20 ........... Braking unit interface M1...M4 ....... Power part fan
A21 ........... Snubber board M10...M13 ... Control part fan
A30, A40 ... Filter board

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Design drawing BU 6V450 and BU 6V900
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A1 ............ Braking unit driver M1 ............ Power part fan

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Circuit diagram BU 6V450 and 6V900

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Warranty Report
Distributor
Your warranty claim No. Warranty
Customer
End user / Factory etc. Out of Warranty
Inverter type (F1.01)
Serial number (F1.05)
Purchase date
Installation date
Failure date
Engineer / Investigator
Phone No. / Fax No. Sign
Date

Application:
HTSI

Failure description: Please describe as detail as you can
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Fault memory (F3) (1)
(2)
(3)
Acceleration time (C2.05/C2.07) = s Ambient temperature: Normal / High / Low
Deceleration time (C2.06/C2.08) = s Length of motor cable = m
Pulse frequency (B3.30) = kHz

Broken components:

Repairable? Y/N

Remarks / Notes:

Sign:

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Schneider Electric Power Drives GmbH
Ruthnergasse 1
A-1210 Vienna
Phone: +43 (0)1 29191 0
Fax: +43 (0)1 29191 15
www.schneider-electric-power-drives.com

Schneider Electric Power Drives
steht für intelligente High-Performance.
Als Teil von Schneider Electric sind wir einer der
führenden Anbieter von Umrichtern und Motoren.
Hervorgegangen aus der ELIN steht für uns Qualität,
fundierte Beratung und flexibler Service im Dienste des
Kunden an oberster Stelle.
Deshalb widmen wir einen wesentlichen Teil unserer
Aktivitäten der permanenten Optimierung von Prozessen
und der Entwicklung von zielgruppengerechten Lösungen,
die selbst höchsten Anforderungen gerecht werden.

Schneider Electric Power Drives
stands for intelligent high-performance.
As part of Schneider Electric, we are one of the leading
providers of inverters and motors. Emanating from ELIN,
quality, consolidated advice and more flexible service for
customer takes top priority.
Therefore we dedicate an essential part of our activities
to permanently optimising processes and developing
solutions for target groups which will meet even the
highest demands.

www.schneider-electric-power-drives.com

Informationen schnell zur Hand
Neben Angaben zum Unternehmen bieten wir zu all
unseren Produkten eine detaillierte Auflistung der
technischen Daten und zugehörigen Optionen sowie
hilfreiche Softwaretools zur Parametrierung unserer
Umrichter.

Information quick at hand
In addition to company specifications we have made
available to you a detailed list of technical data for all
our products as well as helpful software tools to set
up the parameters of our inverters.

Technische Änderungen vorbehalten.
The right to make technical changes is reserved.
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Service instructions

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