Miele Gas Dryer T9820 Service Manual

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Service Manual for Miele Gas Dryer T9800, T9820, T98XX (US Model)

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Miele Gas Dryer T9820 Service Manual

  1. 1. TECHNICAL INFORMATIONT 980x and T 982x Dryers (US Models) © 2012 Miele USA
  2. 2. T 980x/T 982xTechnical InformationTable of ContentsA  Warning and Safety Instructions ............................................................ 6  1  General Information ................................................................................... 6  2  Gas Dryers ................................................................................................ 6  3  Fire Danger Due To Excessive Lint ........................................................... 7  4  Restoring the Ground Connection after Dismantling the Front and Side Panels........................................................................................................ 7 B  Modification History ................................................................................. 8 C  Technical Data .......................................................................................... 9 D  Layout of Electrical Components ......................................................... 10  1  T 980x...................................................................................................... 10  2  T 982x...................................................................................................... 11 010  Casing, Front Panel ............................................................................... 12  1  Technical Data......................................................................................... 13  4  Service..................................................................................................... 13  4.1  Lid Removal ................................................................................. 13  4.2  Removing the Front Panel ........................................................... 14  4.3  Side Panel Removal .................................................................... 14 020  Door, Lock .............................................................................................. 16  1  Technical Data......................................................................................... 17  2  Function ................................................................................................... 17  2.1  Door Lock (A2) ............................................................................. 17  4  Service..................................................................................................... 17  4.1  Door Removal .............................................................................. 17  4.2  Door Hinge Removal ................................................................... 18  4.3  Installing the Door Hinge ............................................................. 18  4.4  Removing the Door Lock ............................................................. 19 030  Drum, Rear Bearing, Residual Moisture Sensor, Heater Bank ........... 20  1  Technical Data......................................................................................... 21  2  Function ................................................................................................... 22  2.1  No-Load Detection ....................................................................... 22  2.2  Residual Moisture Measurement ................................................. 22  2.3  Heater Control ............................................................................. 23  2.4  Temperature Limiter with Manual Reset (1F1, 2F1, 3F1) ............ 23  2.5  Drying Air NTC (1R30) ................................................................. 23  2.6  Heater Bank NTC (2R30) ............................................................ 23  2.7  Interior Drum Light (H3/6) ............................................................ 23  3  Fault Repair ............................................................................................. 23  3.1  Temperature Limiter with Manual Reset (F1) Has Tripped .......... 23  4  Service..................................................................................................... 24  4.1  Heater Bank Removal (T 980x) ................................................... 24  4.2  Rear Bearing Removal ................................................................ 25  2
  3. 3. T 980x/T 982x Technical Information 4.3  Residual Moisture Sensor Removal ............................................ 27  4.4  Drum Light Removal .................................................................... 27  4.5  Lightbulb Replacement ................................................................ 27 031  Gas Heating (T 982x) .............................................................................. 28  1  Technical Data......................................................................................... 29  2  Function ................................................................................................... 29  2.1  Gas Unit ....................................................................................... 29  4  Service..................................................................................................... 33  4.1  Checking the Gas Burner ............................................................ 33  4.2  Removing the Gas Solenoid ........................................................ 35  4.3  Installing the Gas Solenoid Valve ................................................ 36  4.4  Removing the Gas Burner ........................................................... 38  4.5  Installing the Gas Burner ............................................................. 39 040  Motor, Fan ............................................................................................... 40  1  Technical Data......................................................................................... 41  4  Service..................................................................................................... 41  4.1  Fan Impeller Replacement ........................................................... 41  4.2  Motor Replacement ..................................................................... 43 050   Air Shield, Front Bearing ....................................................................... 44  1  Technical Data......................................................................................... 45  3  Fault Repair ............................................................................................. 45  3.1  Vibration Noises from the Base Plate .......................................... 45  4  Service..................................................................................................... 46  4.1  Air Shield Removal ...................................................................... 46  4.2  Felt Seal Replacement ................................................................ 47 090  Fascia Panel, Electronic ........................................................................ 49  1  Technical Data......................................................................................... 50  2  Function ................................................................................................... 50  2.1   Reversing (Electric) (T 980x) ....................................................... 50  2.2  Reversing (Gas) (T 982x) ............................................................ 50  2.3  Dryer Function after a Power Interruption .................................... 50  2.4  Programming Functions ............................................................... 50  2.5  Residual Moisture Sensing .......................................................... 51  2.6  Overriding the Time Control ......................................................... 52  2.7  Insufficient Air Detection .............................................................. 52  2.8  Operating Hours Counter ............................................................. 52  2.9  Low-Voltage Detection ................................................................. 52  3  Fault Repair ............................................................................................. 53  3.1  “End” LED Is Steadily Lit .............................................................. 53  3.2   “Check Filter/Vent” LED Is Steadily Lit ........................................ 53  3.3   “Check Filter/Vent” LED Flashes Rapidly .................................... 54  3.4   “Rotary Iron” LED Flashes ........................................................... 54  3.5   “Hand Iron” LED Flashes ............................................................. 54  3.6  All Program LEDs Flash .............................................................. 55  3.7  F0: No Fault ................................................................................. 55  3.8  F1: Short Circuit in Heater Bank NTC (2R30) .............................. 55  3
  4. 4. T 980x/T 982xTechnical Information 3.9  F2: Open Circuit in Heater Bank NTC (2R30) ............................. 55  3.10  F3: Drying Air NTC (1R30) Short Circuit ...................................... 56  3.11  F4: Drying Air NTC (1R30) Open Circuit ..................................... 57  3.12  F50: Motor Stalls and Heater Is On for 3 Seconds ...................... 57  3.13  F55: Overriding Time Limit Exceeded ......................................... 57  3.14  F66: Air Leakage ......................................................................... 58  3.15   F98: No Gas Ignition (T 982x only) .............................................. 58  3.16  F99: Appliance Lockdown ............................................................ 59  3.17   Laundry Is Overdried/F55 (Overriding Time Limit Exceeded) ..... 59  3.18  Dryer Shuts Itself Off ................................................................... 59  3.19   Top 4 LEDs Flash ........................................................................ 60  4  Service..................................................................................................... 60  4.1  Programming Mode Summary ..................................................... 60  4.2  Activating/Deactivating the Demonstration Mode ........................ 62  4.3  Service Mode Summary .............................................................. 62  4.4  Removing the Fascia, Electronic and Electronic Support Panel .. 65 100  Electrical System ................................................................................... 66  1  Technical Data......................................................................................... 67  4  Service..................................................................................................... 67  4.1  Fuse Replacement (T 980x only) ................................................. 67  4.2  Heater Relay Removal ................................................................. 67  4.3  Pressure Switch B9/3 Removal ................................................... 68 110  Technical Service Bulletins ................................................................... 69  1  T 9820 Gas Dryer Airflow ........................................................................ 69  2  Dryer Venting Information........................................................................ 69  3  Dryer Will Power Up, Push Buttons Inoperable ....................................... 71  4  How to Diagnose and Repair Specific Internal Ducting Issues ............... 72  5  T 9800, T 9820 Moisture Sensor Testing ................................................ 73  6  Insulation Mats on Some SLC Laundry Machines May Come Loose ..... 73  7  Broken Belts in T 9800 & T 9820 SLC Dryers ......................................... 73  8  F97 and the T 9820 Dryer ....................................................................... 75  9  Laundry Detergent Notice: Purex Complete 3-in1 Laundry Sheets ......... 75  10   SLC Dryers Repeatedly Displaying the Filter/Vent Warning ................... 76  11   T 9822 Flame Control Circuit Update ...................................................... 77  12   SLC Dryers, T 98XX and Low Voltage .................................................... 79  13   SLC Dryer Impeller Update: T 98xx ......................................................... 80  14   Dryer Duct Length ................................................................................... 81 List of FiguresFigure D-1: T 980x Component Layout ........................................................................... 10Figure D-2: T 982x Component Layout ........................................................................... 11Figure 010-1: Lid Removal .............................................................................................. 13Figure 010-2: Front Panel Removal ................................................................................ 14Figure 010-3: Side Panel Removal ................................................................................. 15Figure 020-1: Door Removal ........................................................................................... 18Figure 020-2: Door Lock Removal .................................................................................. 19 4
  5. 5. T 980x/T 982x Technical InformationFigure 030-1: Heater Bank Removal............................................................................... 25Figure 030-2: Bearing Housing Attachment .................................................................... 26Figure 030-3: Rear Bearing............................................................................................. 26Figure 031-1: Gas Ignition Schematic ............................................................................. 30Figure 031-2: Onset of Drying Process, Before Gas Starts to Flow................................ 30Figure 031-3: Drying Process, After Gas Has Started to Flow ........................................ 31Figure 031-4: Drying Process, Flowing Gas Ignites the Flame ....................................... 31Figure 031-5: Drying Process after Flame Has Gone Out .............................................. 32Figure 031-6: Port for Measuring Jet Pressure ............................................................... 34Figure 031-7: Gas Regulation Valve ............................................................................... 35Figure 031-8: Disconnecting the Gas Regulation Valve ................................................. 36Figure 031-9: Attaching the Gas Connecting Line to the Gas Regulation Valve ............ 36Figure 031-10: Tightening the Gas Regulation Valve ..................................................... 37Figure 031-11: Gas Regulation Valve ............................................................................. 37Figure 031-12: Gas Regulation Valve ............................................................................. 38Figure 031-13: Gas Regulation Valve ............................................................................. 39Figure 040-1: Fan Impeller Removal............................................................................... 42Figure 050-1: Sealing Strip Installation ........................................................................... 45Figure 050-2: Air Shield Removal ................................................................................... 46Figure 050-3: Felt Seal Installation ................................................................................. 47Figure 090-1: Removing the Fascia, Electronic, and Electronic Support Panel .............. 65Figure 100-1: Fuse Replacement.................................................................................... 67List of TablesTable C-1: General Technical Data................................................................................... 9Table 010-1: Casing Technical Data ............................................................................... 13Table 020-1: Door Technical Data .................................................................................. 17Table 030-1: Drum Data.................................................................................................. 21Table 030-2: Heater Data................................................................................................ 21Table 030-3: Heater Bank and Drying Air NTC Resistance Values ................................ 22Table 031-1: Gas Heating Data ...................................................................................... 29Table 040-1: Fan and Motor Data ................................................................................... 41Table 050-1: Air Shield Data ........................................................................................... 45Table 090-1: Technical Data ........................................................................................... 50Table 090-2: Residual Moisture, Delicates ..................................................................... 51Table 090-3: Values for Low-Voltage Detection.............................................................. 52Table 090-4: Programming Mode Summary ................................................................... 61Table 090-5: Service Mode Summary............................................................................. 64Table 100-1: Electrical System Data ............................................................................... 67 5
  6. 6. T 980x/T 982xTechnical InformationA Warning and Safety Instructions1 General Information Danger! Danger of high voltages when working on small components. In a single-board control, as in this appliances electronic (EPWL 3xx), there is no structural galvanic potential disconnection to the power supply. Therefore, be careful when working on small components, as they may be carrying voltage if the dryer is not disconnected completely from its power supply. Components with sharp edges may stick out. Wear protective gloves and goggles and use edge shields to prevent cuts by sharp-edged components. Note: All repairs should be performed by a trained technician in strict accordance with national, state and local codes. Any repairs or maintenance performed by unqualified personnel could be dangerous. When servicing, modifying, testing or maintaining appliances, all applicable laws, regulations and accident prevention guidelines must be observed. After work has been completed, a visual as well as an operational check should always be performed. After work has been completed, do a touch current measurement on machines with a ground connection on all accessible conductive parts that are not grounded. Before starting any service work, disconnect the dryer from its power source. Even with the appliance switched off, voltage may exist on some components.2 Gas Dryers Warning! Before starting any service or repair work, it is essential to disconnect the dryer from its gas supply. Service work may only be performed by a technician trained in gas technology, and in keeping with all relevant safety standards. Prior to the start of service work, check all gas lines and components to make sure that they are sealed. If there is a gas odor, shut the gas tap. Avoid sparks or any fire source, and air out all rooms. 6
  7. 7. T 980x/T 982x Technical Information3 Fire Danger Due To Excessive Lint Danger! The dryer must not be operated if there are leaks in the air shield, such as those caused by a defective seal. If the dryer is operated regardless of these leaks, this will result in heavy lint in the appliance interior. Moisture can make this excessive lint soggy, which will lead to electrical short circuits and possibly fire. Indications of excessive lint: a poorly maintained dryer, long running time (fixed maximum time has been exceeded), water under the fascia panel. Remedy: - Remove all lint from the dryer. - Find and repair leaks.4 Restoring the Ground Connection after Dismantling the Front and Side Panels The ground connection for laundry-care appliances is established via screws: raised-head screws with teeth or serrated washers underneath connect the ground lead to the interference-suppression filter, the front panel, the side panels and the housing frame. These screws are different from the rest of the appliance screws in their diameter, type of thread, and type and material of the washer. The ground connection is made only if the ground screws are screwed into their correct positions during reassembly. When dismantling the front and side panels, mark the positions of the ground screws. During reassembly, screw the ground screws into these same positions. To check the proper screw positions, measure the resistance of the ground connection loop. 7
  8. 8. T 980x/T 982xTechnical InformationB Modification History When Who What 8/29/2012 Jessica Naples Fan impeller replacement procedure modified (page 42) 7/27/2012 Jessica Naples F99 information added 7/3/2012 Jessica Naples Tech service bulletins added 3/19/2012 Jessica Naples Fan impeller replacement procedure modified (page 41) 2/16/2012 Jessica Naples Tech service bulletins added 9/30/2011 Jessica Naples Residual moisture test info added (pages 63-64) 7/15/2011 Jessica Naples Low-voltage detection info added (page 52) 5/12/2011 Jessica Naples Pressure switch B9/3 info added 6/3/2010 Jessica Naples T 9802 added (reflected in “T 980x”) 8/27/2009 Jessica Naples Conversion for Website 3/11/2009 Liane Westerhelweg Version 5 5/16/2008 Liane Westerhelweg Version 4 5/14/2008 Liane Westerhelweg Version 3 12/8/2006 Olaf Meyer zu Drewer Version 2 11/30/2006 Olaf Meyer zu Drewer Initial compilation 8
  9. 9. T 980x/T 982x Technical InformationC Technical Data T 980x T 982x Electric Heating Gas Heating Dimensions Height x width x depth: 39” x 27” x 30” Shipping Height x width x depth: 42” x 30” x 32” dimensions Shipping weight Approx. 165 lbs Required voltage 2NAC 240V (208V) 1NAC 120V Frequency 60Hz Connected load 5.8kW 0.3kW (electric) Natural gas - N/A 1076 BTU/ft3 output Natural gas - net N/A Supply pressure 4oz/in2 pressure Exhaust pipe Connecting pipe nominal (vented dryers N/A diameter 4” only) Washer/dryer No stack Under-counter No Washer/dryer Optional stand Liquid propane N/A Optional conversion PC interface Yes RemoteVision Compatible, optional accessory Table C-1: General Technical Data 9
  10. 10. T 980x/T 982xTechnical InformationD Layout of Electrical Components1 T 980x Figure D-1: T 980x Component Layout 1 (Z/1) Interference suppression capacitor 11 (A2) Door lock 2 (X3/1) Terminal block 12 (B3/1) Residual moisture sensor - Drum rib 3 (F2) Fuse 13 (WLAN) RemoteVision (optional) 4 (1K1/1) Heater relay 14 (C5) Motor capacitor 5 (2K1/1) Heater relay 15 (M5) Motor 6 (3K1/1) Heater relay 16 (1R30) Drying air NTC 7 (B3/1) Residual moisture sensor 17 (3F1) Temperature limiter w/manual reset 8 (1N1) Electronic (EPWL) 18 (2F1) Temperature limiter w/manual reset 9 (H3/6) Drum light 19 (2R30) Heater bank NTC 10 (R1, R2, R3) Heater bank 20 (1F1) Temperature limiter w/manual reset 10
  11. 11. T 980x/T 982x Technical Information2 T 982x Figure D-2: T 982x Component Layout 1 (Z/1) Interference suppression capacitor 12 (C5) Motor capacitor 2 (X3/1) Terminal block 13 (M5) Motor 3 (F2) Fuse 14 (1R30) Drying air NTC 4 (1K1/1) Heater relay 15 (Y57/1) Gas solenoid 5 (2K1/1) Heater relay 16 (Y57/2) Gas solenoid 6 (B3/1) Residual moisture sensor 17 (E1/1) Igniter electrode 18 (2F1) Temperature limiter flame flashback 7 (1N1) Electronic (EPWL) w/manual reset 8 (H3/6) Drum light 19 (B1/16) Flame sensor (radiant output sensor) 9 (A2) Door lock 20 (1F1) Temperature limiter w/manual reset 10 (B3/1) Residual moisture sensor - Drum rib 21 (2R30) Heater bank NTC 11 (WLAN) RemoteVision (optional) 11
  12. 12. T 980x/T 982xTechnical Information010 Casing, Front Panel 12
  13. 13. T 980x/T 982x Technical Information1 Technical Data Upright, frame construction, side walls Design embossed for reinforcement Table 010-1: Casing Technical Data4 Service4.1 Lid Removal 1. Disconnect the machine from the power supply. 2. Remove the screw caps on the sides. See Figure 010-1. 3. Loosen the T20 screws a maximum of 5 turns. Do not unscrew the screws completely. 4. Press in on the screws. 5. Lift the lid at the front and slide it back to release it from its retainers. Take the lid off. Figure 010-1: Lid Removal 13
  14. 14. T 980x/T 982xTechnical Information4.2 Removing the Front Panel 1. Disconnect the machine from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the fascia, the electronic, and the electronics support panel; refer to Section 090-4.4. 4. Open the door. 5. Remove the five T20 screws securing the front of the front panel. See Figure 010-2, Item 1. 6. Close the door. 7. Remove the two T20 screws securing the top of the front panel. See Figure 010-2, Item 2. 8. Disconnect the door lock Molex connection. 9. Pull the front panel upwards to remove. Figure 010-2: Front Panel Removal4.3 Side Panel Removal 1. Disconnect the machine from the power supply. 2. Remove the lid; refer to Section 010-4.1. 3. Remove the front panel; refer to Section 010-4.2. 14
  15. 15. T 980x/T 982x Technical Information 4. Remove the side panel retaining screws (nine T20s per panel). See Figure 010-3. 5. Take the side panel(s) off. Figure 010-3: Side Panel Removal Note: When re-installing the side panels, ensure that the screws with serrated washers (ground screws) are installed in the correct positions. 15
  16. 16. T 980x/T 982xTechnical Information020 Door, Lock 16
  17. 17. T 980x/T 982x Technical Information1 Technical Data Porthole door. Door hinge is on the left Door and cannot be reversed. Manual pull-open lock. Lock Door lock contact switch (A2). Drum door open = contact open. Table 020-1: Door Technical Data2 Function2.1 Door Lock (A2) Pull the door open. An open door is registered by a microswitch in the door lock (drum door open = contact open).4 Service4.1 Door Removal 1. Disconnect the appliance from the power supply. 2. Take off the front panel; refer to Section 010-4.2. 3. Turn the front panel around and remove the two locknuts (Figure 020-1, Item 1) with an 8-millimeter nut driver or wrench. 4. Carefully separate the door from the front panel. 17
  18. 18. T 980x/T 982xTechnical Information Figure 020-1: Door Removal4.2 Door Hinge Removal 1. Disconnect the appliance from the power supply. 2. Remove the door; refer to Section 020-4.1. 3. Turn the door over; lay it on a soft mat or cloth so that the door glass does not get damaged. 4. Remove the two T20 bolts securing the hinge to the door (Figure 020-1, Item 2). 5. Insert a flathead screwdriver under the bottom of the hinge and lift up to release the hinge from its base on the door (Figure 020-1, Item 3).4.3 Installing the Door Hinge 1. Open the hinge and slide it back onto its base. 2. Close the hinge and re-secure it with the two T20 bolts. Note: Make sure that the hinge lines up with the welded seam of the door seal. 18
  19. 19. T 980x/T 982x Technical Information4.4 Removing the Door Lock 1. Disconnect the appliance from the power supply. 2. Take off the front panel; refer to Section 010-4.2. 3. Remove the two T20 screws securing the door lock to the front panel. See Figure 020-2. Figure 020-2: Door Lock Removal 19
  20. 20. T 980x/T 982xTechnical Information030 Drum, Rear Bearing, Residual Moisture Sensor, Heater Bank 20
  21. 21. T 980x/T 982x Technical Information1 Technical Data Maximum load 17.6 lbs (8 kg) Drum volume 48 gal (180L) Drum speed 48 rpm Table 030-1: Drum Data Heating mode Electric; for gas, refer to Table 031-1. Heater type Duct heater bank (R1, R2, R3); 3-filament Heater output 5.2kW (1.90kW, 1.70kW, 1.60kW) Temperature sensor Heater bank NTC (2R30) Temperature limiter 3 x 3/4“ temperature limiter (F1) with manual reset, 16A E 14 bayonet closure, activation via relay on the Drum light (H3/6) electronic (EPWL). USA: 120V, 15W Table 030-2: Heater Data Temperature Resistance (kΩ) Heater bank NTC Drying air NTC °F °C (2R30) (1R30) 32 0 340 38.0 41 5 261 29.7 50 10 203 23.4 59 15 159 18.6 68 20 126 14.9 77 25 100 12.0 86 30 80.2 9.73 95 35 64.8 7.96 104 40 52.7 6.55 113 45 43.1 5.42 122 50 35.5 4.52 131 55 29.4 3.78 140 60 24.5 3.19 149 65 20.5 2.70 158 70 17.3 2.29 167 75 14.6 1.96 176 80 12.5 1.68 185 85 10.6 1.45 194 90 9.13 1.25 199 93 8.34 1.15 203 95 7.86 1.09 21
  22. 22. T 980x/T 982xTechnical Information Temperature Resistance (kΩ) Heater bank NTC Drying air NTC °F °C (2R30) (1R30) 212 100 6.80 1.06 230 110 5.14 0.73 248 120 3.95 0.569 266 130 3.07 0.449 284 140 2.41 0.358 302 150 1.92 0.289 320 160 1.55 N/A 338 170 1.26 N/A 356 180 1.03 N/A 374 190 0.852 N/A 392 200 0.710 N/A Table 030-3: Heater Bank and Drying Air NTC Resistance Values2 Function2.1 No-Load Detection Only in residual moisture programs. Senses no load or very dry laundry. Residual moisture sensor B3/1 detects the electrical resistance of the laundry load; if this resistance is very high, it means that the laundry is dry or that there is no load in the drum. If this is the case, then the drying cycle will stop within 30 seconds of starting and the message Check load will be displayed.2.2 Residual Moisture Measurement Residual moisture is calculated based on the electrical resistance of the damp laundry, which is measured by a sensor between a drum rib and the drum casing. Note: Only one rib is used for this measurement. The value of this electrical resistance depends on the type of laundry, the degree of moisture, the laundry load (weight) and the drums rotating angle (centrifugal force, rib contact). 22
  23. 23. T 980x/T 982x Technical Information2.3 Heater Control Safety function: If the drying air NTC (1R30) is defective, then the heater will not be switched on. The heater is switched off as soon as the heater relay has been running for more than 5 seconds without the motor relay being activated as well. Heater reactivation is delayed by 10 seconds; the auxiliary heater is switched off before, during and after a reversing pause.2.4 Temperature Limiter with Manual Reset (1F1, 2F1, 3F1) Three closed 3/4-inch temperature limiters, with manual reset via pushbutton, are on the heater bank (T 980x only).2.5 Drying Air NTC (1R30) If the drying air NTC detects temperatures lower than 5°F (-15°C) or higher than 320°F (160°C), then this NTC is defective.2.6 Heater Bank NTC (2R30) An open circuit in the heater bank NTC can only be detected at temperatures higher than 57°F (14°C). Since lower temperatures can exist during dryer operation, sensor readings will be evaluated only after the heater has been running for at least 1 minute. Note: If the heater is defective, fault F4 (heater bank NTC) is issued. If the heater bank NTC has a short circuit (corresponding to 482°F), the heater will be switched off immediately.2.7 Interior Drum Light (H3/6) Time controlled: 1 second after the door is opened. Shutoff delay: 5 minutes. The light is always switched off when the door is closed.3 Fault Repair3.1 Temperature Limiter with Manual Reset (F1) Has Tripped Symptom: The temperature limiter has tripped repeatedly. Cause: Clogged lint screen. Remedy: Clean the lint screen. 23
  24. 24. T 980x/T 982xTechnical Information Cause: Clogged air duct vents. Remedy: Clean the air duct openings. Cause: Clogged air vents/exhaust vents. Remedy: Clean the air vents/exhaust vents. Cause: Drum is sluggish. Remedy: 1. Check the front bearing seals (front and back needle felting) for correct position. 2. Check and adjust the bearing of the front support rollers. Cause: Intermediate (small) drive is faulty. Remedy: Check the intermediate drive for dirt deposits, wear and tear, and tension (also check the tension spring). Cause: Drum belt is faulty. Remedy: Check the drum belt for dirt deposits, wear and tear, and tension (tension spring on intermediate drive).4 Service4.1 Heater Bank Removal (T 980x) 1. Disconnect the appliance from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the front panel; refer to Section 010-4.2. 4. Remove the right side panel; refer to Section 010-4.3. 5. Remove the four T20 screws securing the service panel door at the back of the dryer (Figure 030-1, Item 1). 6. Remove the wiring harness from the cable clip inside the rear panel of the appliance. 7. Disconnect all electrical connections. 8. Remove the two T20s securing the heater bank (Figure 030-1, Item 2) and detach the heater bank to remove. 24
  25. 25. T 980x/T 982x Technical Information Figure 030-1: Heater Bank Removal4.2 Rear Bearing Removal 1. Disconnect the appliance from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the front panel; refer to Section 010-4.2. 4. Remove the right side panel; refer to Section 010-4.3. 5. Take the drum belt off of the intermediate (small) drive. 6. In electric dryers: Detach the heater bank and move it to the side (without removing it); see Section 030-4.1. 7. Unscrew the bearing housing attachment (two T30s; see arrows, Figure 030-2). 25
  26. 26. T 980x/T 982xTechnical Information Figure 030-2: Bearing Housing Attachment 8. Remove the three T20 screws securing the bearing cover at the rear of the machine; see Figure 030-3, Item 1. 9. Unlock the rear bearing and take it off. Figure 030-3: Rear Bearing 26
  27. 27. T 980x/T 982x Technical Information4.3 Residual Moisture Sensor Removal 1. Disconnect the appliance from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. Note: The residual moisture sensor is located at Figure D-1, Item 7. 3. Unhook the spring. 4. Press up on the plastic support to free it from the retainers on the cable guide on the side panel. 5. Disconnect the two-pin Molex connector from the electronic, as well as the ground wire from the rear panel of the appliance.4.4 Drum Light Removal 1. Disconnect the machine from the power supply. 2. Remove the front panel. See Section 010-4.2. 3. Twist the light half a turn (180° counterclockwise) and remove it from its housing on the air shield (see Figure D-1, Item 9, for location). 4. Free the two-pin wiring harness from the zip tie on the air shield (cut the zip tie, if necessary) and the cable guide on the metal support plate.4.5 Lightbulb Replacement See the operating manual. 27
  28. 28. T 980x/T 982xTechnical Information031 Gas Heating (T 982x) 28
  29. 29. T 980x/T 982x Technical Information1 Technical Data Heating mode Gas; for electric, refer to Table 030-2. Gas burner Gas burner, pipe configuration, 5.7kW. Model: Venturi Natural-gas version - 5.4kW ANSI Gas A, 1076 BTU/ft3 output Temperature sensor Heater bank NTC (2R30) Two 3/4” bi-metal temperature limiters (1F1, 2F1) with Temperature limiter manual reset, 16A, 248°F/212°F ± 5 K Safety time; refer to ≤ 90 seconds Section 031-2.1.3 Table 031-1: Gas Heating Data2 Function2.1 Gas Unit2.1.1 Gas Solenoid Valve (Y57) In gas dryers, gas solenoid valve Y57 is activated via heater relays 1K1/1 and 2K1/1. Gas solenoid valve Y57 consists of gas solenoid valves Y57/1 and Y57/2. Gas solenoid valve Y57/1, in turn, consists of a maintaining coil and a booster coil. Gas solenoid valve Y57 only opens when both solenoid valves (Y57/1 and Y57/2) are opened. Gas solenoid valve Y57/1 only opens when its maintaining and booster coils carry voltage. Once gas solenoid valve Y57/1 is open, it remains in this state as long as its maintaining coil carries voltage. 29
  30. 30. T 980x/T 982xTechnical Information2.1.2 Gas Ignition Figure 031-1: Gas Ignition Schematic 1 NTC heating (1R30, 2R30) in heating duct 2 Gas solenoid valve Y57 3 Gas solenoid valve Y57/2 4 Gas solenoid valve Y57/1 5 Maintaining coil for gas solenoid valve Y57/1 6 Booster coil for gas solenoid valve Y57/1 7 Igniter E1/1 8 Temperature limiter (1F1, 2F1) 9 Flame sensor (radiance sensor B1/16) Figure 031-2: Onset of Drying Process, Before Gas Starts to Flow 30
  31. 31. T 980x/T 982x Technical Information At the start of the drying process, flame sensor B1/16 is in a cool state and is closed. Gas solenoid valve Y57/2 is not carrying voltage and is therefore closed. At the demand for heating, both heater relays 1K1/1 and 2K1/1 close. Maintaining and booster coils of gas solenoid valve Y57/1 carry voltage so gas solenoid valve Y57/1 opens; igniter electrode E1/1 receives voltage and slowly starts to glow. Since both gas solenoid valves Y57/2 and Y57/1 switched in sequence are not open, gas does not yet flow. Figure 031-3: Drying Process, After Gas Has Started to Flow Once the heat radiance on flame sensor B1/16 is strong enough, the thermostat opens. Now igniter electrode E1/1 no longer carries voltage. However, now gas solenoid valve Y57/2 is receiving voltage (via low-ohmic igniter electrode E1/1), so it opens. Since gas solenoid valve Y57/1 is still open via its maintaining coil, gas now flows into the burner and ignites at red-hot igniter electrode E1/1. Figure 031-4: Drying Process, Flowing Gas Ignites the Flame The flame is on. The flame keeps flame sensor B1/16 open and at temperature. 31
  32. 32. T 980x/T 982xTechnical Information Figure 031-5: Drying Process after Flame Has Gone Out If the flame goes out, the sluggishness of flame sensor B1/16 will cause gas to continue flowing until gas solenoid valve Y57/2 closes and stops the gas flow. For safety time, refer to Section 031-2.1.3. If the burner overheats, the thermostat/temperature limiter (1F1, 2F1) interrupts the voltage circuit of gas solenoid Y57, so gas solenoids Y57/1 and Y57/2 shut off.2.1.3 Safety Time The safety time is the time span between the point when the flame goes out and the gas supply shuts off.2.1.4 Heater Bank NTC (2R30) Heater bank NTC 2R30 is located at the reflective plate, under the back service panel. For NTC resistance values, refer to Table 030-3.2.1.5 Temperature Limiters (1F1, 2F1) Two ¾” bi-metal temperature limiters (1F1, 2F1) with manual reset at the burner. The bi-metal temperature limiter 1F1 at the burner exit detects any overheating of the burner due to insufficient air or air leakage. The bi-metal temperature limiter 2F1 at the burner entrance detects any flame flashback. 32
  33. 33. T 980x/T 982x Technical Information4 Service Note: When working on a gas dryer (T 982x), the drum door must be closed. If the front panel is off, the opening to the drum needs to be blocked off.4.1 Checking the Gas Burner Danger! Danger of burning. Gas will ignite at igniter electrode E1/1 once the electrode has received voltage and begun to glow. Note: There is a measuring port for jet pressure at the gas valve, but no measuring port for the gas-tapping pressure. 1. Test the gas resting pressure (target value: 4 ounces per square inch (17.4 millibars)). Note: Gas resting pressure is the pressure of gas that is stationary, without tapping the gas. 2. Check the gas-tapping pressure (target value: 1.9 ounces per square inch (8.2 millibars)). Note: Gas-tapping pressure is the gas flow pressure at the connection of the dryer, with the burner running. This pressure can only be measured while operating, with a functional burner. 3. Check the temperature limiters (1F1, 2F1) for continuity. Warning! If the front temperature limiter (2F1) has tripped, assume that the burner and its connecting cables have sustained thermal damage by a flashback. In this case, replace the burner and its connecting cables. At the same time, check the general area of the burner for heat damage. Warning! If the rear temperature limiter (1F1) has tripped, check the exhaust air duct and the fan for heat damage. 33
  34. 34. T 980x/T 982xTechnical Information 4. Check the function of the exhaust air duct and the fan. 5. Check the flame sensor (B1/16) for continuity (at room temperature). Danger! Danger of high voltage when working on the appliance while its opened. Components carry voltage. 6. Start the drying program. 7. Check if the heater relays (1K1/1) and (2K1/1) close. 8. Check if the maintaining coil and the booster coil of gas solenoid Y57/1 are receiving voltage, and if the gas solenoid opens audibly. Note: No gas flow since gas solenoid Y57/2 is closed. Figure 031-6: Port for Measuring Jet Pressure 9. Check that no gas flows out, and measure the gas-tapping pressure; refer to Figure 031-6. 10. Check if igniter electrode E1/1 carries voltage and starts glowing. 11. With igniter electrode E1/1 red-hot, check if flame sensor B1/16 opens. 12. Now check if gas solenoid valve Y57/2 receives voltage via low-ohmic igniter electrode E1/1 and opens. For jet pressure, refer to Figure 031-6. 13. Check if gas solenoid Y57/1 continues to be open via the maintaining coil of the gas solenoid. 14. With the flame gone out, check if gas solenoid Y57/2 closes flame sensor B1/16 within the safety time and shuts off the gas stream. For safety time, refer to Section 031-2.1.3. 34
  35. 35. T 980x/T 982x Technical Information4.2 Removing the Gas Solenoid 1. Disconnect the machine from the power and gas supplies. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the front panel; refer to Section 010-4.2. 4. Remove the left side panel; refer to Section 010-4.3. 5. Pull the plugs off the gas regulation valve. See Figure 031-7. Figure 031-7: Gas Regulation Valve 6. Release the connecting line from the gas regulation valve using two metric 17mm open-end wrenches. With one wrench, loosen the nut on the gas line, and with the other, maintain counterpressure on the valve. See Figure 031-8. 35
  36. 36. T 980x/T 982xTechnical Information Figure 031-8: Disconnecting the Gas Regulation Valve 7. Remove the retaining bracket of the gas regulation valve using a metric 7mm Allen wrench and a Phillips-head screwdriver. 8. Take the gas regulation valve off the burner.4.3 Installing the Gas Solenoid Valve Warning! Clean soiled components with spray cleaner (MICROTEC Profi-Clean, mat. no. 05321000). 1. Insert the gas regulation valve into the burner. 2. Fasten the bracket of the gas regulation valve, using a metric 7mm Allen wrench and a Phillips screwdriver. 3. Using two metric 17mm wrenches, attach the gas connecting line to the gas regulation valve. Fasten the connecting nut and turn all the way to its stop. See Figure 031-9. Figure 031-9: Attaching the Gas Connecting Line to the Gas Regulation Valve 36
  37. 37. T 980x/T 982x Technical Information 4. For the permanent assembly, give the connecting nut another quarter- turn with a metric 17mm open-end wrench (19 Nm ± 1 Nm) while maintaining counterpressure on the double nipple with a second metric 17mm open-end wrench. See Figure 031-10. Figure 031-10: Tightening the Gas Regulation Valve 5. Connect the 2 plugs and the ground lead to the gas regulation valve. See Figure 031-11. Figure 031-11: Gas Regulation Valve 37
  38. 38. T 980x/T 982xTechnical Information 6. Attach the right side panel. 7. Attach the front panel. 8. Attach the fascia panel. 9. Attach the dryer lid. Warning! Perform an electrical safety check. Perform a gas safety check. With the system under normal gas pressure, check the gas connections for a tight seal using a spray such as Leak Test. Check the dryer for correct function.4.4 Removing the Gas Burner 1. Disconnect the machine from the power and gas supplies. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the front panel; refer to Section 010-4.2. 4. Remove the left side panel; refer to Section 010-4.3. 5. Remove the gas solenoid valve; refer to Section 031-4.2. 6. Loosen the burner retaining screw and take the burner off. See Figure 031-12. Figure 031-12: Gas Regulation Valve 38
  39. 39. T 980x/T 982x Technical Information4.5 Installing the Gas Burner 1. Secure the burner with a screw. See Figure 031-13. Figure 031-13: Gas Regulation Valve 2. Install the gas solenoid valve; refer to Section 031-4.3. 3. Attach the left side panel; refer to Section 010-4.3. 4. Attach the front panel; refer to Section 010-4.2. 5. Attach the fascia panel. 6. Install the dryer lid; refer to Section 010-4.1. Warning! Perform an electrical safety check. Perform a gas safety check. With the system under normal gas pressure, check the gas connections for a tight seal using a spray such as Leak Test. Check the dryer for correct function. 39
  40. 40. T 980x/T 982xTechnical Information040 Motor, Fan 40
  41. 41. T 980x/T 982x Technical Information1 Technical Data Vented Dryer Gas Dryer Motor, fan Approx. motor rating 400W Fan, volume flow, free Approx. 200cfm (66 pipe, d = 4”, straight-run flowing without additional structures) Table 040-1: Fan and Motor Data4 Service4.1 Fan Impeller Replacement 1. Disconnect the machine from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the fascia, the electronic, and the electronics support panel; refer to Section 090-4.4. 4. Remove the front panel; refer to Section 010-4.2. 5. Remove the right side panel; refer to Section 010-4.3. 6. Remove the air shield; see Section 050-4.1. 7. Prop up the front of the drum to reduce any strain on the rear bearing. 8. Hold the rear motor shaft (behind the fan) in place with a 13-millimeter wrench. Loosen the fan impeller bolt by turning it counterclockwise using a 10-millimeter or a T-30 socket, depending on model (use a ratcheting wrench with an extension to generate enough torque). See Figure 040-1. Pull the impeller forward to remove. 41
  42. 42. T 980x/T 982xTechnical Information Figure 040-1: Fan Impeller Removal 9. Install the new fan impeller, and secure it with the 10-millimeter or T-30 bolt (depending on model). 10. Reinstall the air shield. 11. Reinstall the metal bracket in front of the air shield. 12. Reinstall the right side panel, making sure that the grounding screws are in their proper positions. 13. Reinstall the front panel. 14. Reinstall the electronics support panel, the electronic, and the fascia panel. 15. Reconnect the machine to the power supply and test it for correct operation. 16. Once correct operation has been verified, reinstall the lid. 42
  43. 43. T 980x/T 982x Technical Information4.2 Motor Replacement 1. Disconnect the machine from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the fascia, the electronic, and the electronics support panel; refer to Section 090-4.4. 4. Remove the front panel; refer to Section 010-4.2. 5. Remove the right side panel; refer to Section 010-4.3. 6. Unhook the spring from the intermediate drive notch (located directly below the drum belt). 7. Release the drum belt. 8. Prop up the front of the drum to reduce any strain on the rear bearing. 9. Remove the air shield; see Section 050-4.1. 10. Remove the fan impeller. See Section 040-4.1. 11. Remove the T30 screw securing the left rear of the motor bracket, and the T30 screw securing the bottom of the motor bracket. Disconnect the Molex connection and the ground wire (use needlenose pliers, if necessary). 12. Lift the motor up and out from the right side of the machine. 13. Install the new motor. Secure the motor bracket with the two T30 screws. Reconnect the Molex connection and the ground wire. 14. Reinstall the fan impeller. 15. Reinstall the air shield. 16. Reinstall the heater bank. 17. Reinstall the drum, the rear bearing, and the drum belt. 18. Hook the tension spring back onto the intermediate drive notch, using needlenose pliers if necessary. 19. Reposition the drum belt and spin the drum to ensure proper installation on the motor drive. 20. Reinstall the metal bracket in front of the air shield. 21. Reinstall the right side panel, making sure that the grounding screws are in their proper positions. 22. Reinstall the front panel. 23. Reinstall the electronics support panel, the electronic, and the fascia panel. 24. Reconnect the machine to the power supply and test it for correct operation. 25. Once correct operation has been verified, reinstall the lid. 43
  44. 44. T 980x/T 982xTechnical Information050 Air Shield, Front Bearing 44
  45. 45. T 980x/T 982x Technical Information1 Technical Data Filter Flat filter Drying air temperature sensor NTC (1R30) Table 050-1: Air Shield Data3 Fault Repair3.1 Vibration Noises from the Base Plate Cause: The exhaust module vibrates during appliance operation, which causes vibrations in the base plate of the appliance. A buzzing or humming noise is generated. Remedy: Insert a sealing strip (mat. no. 06808080) between the exhaust module and the base plate: 1. Disconnect the machine from the power supply. 2. Remove the front panel; see Section 010-4.2 3. Place a thin flathead screwdriver between the exhaust module and the base plate. 4. Use a thicker screwdriver to widen the gap between the exhaust module and the base plate. 5. Remove the protective film from the sealing strip. 6. Insert the sealing strip into the gap and adhere it under the groove under the exhaust module, making sure that the strip is centered. 7. Remove the thin screwdriver. 8. Replace the front panel. Figure 050-1: Sealing Strip Installation 45
  46. 46. T 980x/T 982xTechnical Information4 Service4.1 Air Shield Removal 1. Disconnect the machine from the power supply. 2. Remove the dryer lid; refer to Section 010-4.1. 3. Remove the fascia, the electronic, and the electronics support panel; refer to Section 090-4.4. 4. Remove the front panel; refer to Section 010-4.2. 5. Remove the right side panel; refer to Section 010-4.3. 6. Remove the two T20 screws securing the top and left side of the metal bracket in front of the air shield. 7. Remove the four T20 screws securing the sides of the air shield. See Figure 050-2, Item 1. 8. Prop up the front of the drum to reduce any strain on the rear bearing. 9. Remove the T30 screw securing the right side of the fan cover (use a ratchet with a 10-inch extension, if necessary). See Figure 050-2, Item 2. 10. Remove the T30 screw securing the bottom of the fan cover (use a ratchet with a 10-inch extension). See Figure 050-2, Item 3. 11. Lift the air shield up slightly, release it from the casing, and pull it down and out; disconnect any electrical connections. Figure 050-2: Air Shield Removal 46
  47. 47. T 980x/T 982x Technical Information4.2 Felt Seal Replacement 1. Disconnect the machine from the power supply. 2. Remove the air shield (Section 050-4.1) but do not disconnect any electrical connections. 3. Lean the air shield against the appliance with the felt seal exposed. 4. Prop up the front of the drum to reduce any strain on the rear bearing. 5. Remove the felt seal by gently prying up the three staples. 6. Clean the drum where the new seal will make contact. 7. Install the new felt seal with the seam facing straight down (6 oclock position). See Figure 050-3. 8. Staple the felt seal at the 12, 4 and 8 oclock positions. See Figure 050-3, Item 1. Note: When stapling the felt seal, note the following: Ensure that the stapler is set to maximum tension for proper penetration. Ensure that the felt is lifted back without shifting the rubber base. Ensure that the stapler is held firmly against the felt seal rubber base and the air shield. Ensure that the staple penetrates the air shield. Figure 050-3: Felt Seal Installation 9. Inspect the fan impeller for dirt, debris or damage. Replace if necessary (see Section 040-4.1). 10. Reinstall the air shield, following the instructions in Section 050-4.1 in 47
  48. 48. T 980x/T 982xTechnical Information reverse order. 11. Reinstall the metal bracket in front of the air shield. 12. Hook the tension spring back onto the intermediate drive notch, using needlenose pliers if necessary. 13. Reinstall the right side panel, making sure that the grounding screws are in their proper positions. 14. Reinstall the front panel. 15. Reinstall the electronics support panel, the electronic, and the fascia panel. 16. Reconnect the machine to the power supply and test it for correct operation. 17. Once correct operation has been verified, reinstall the lid. 48
  49. 49. T 980x/T 982x Technical Information090 Fascia Panel, Electronic 49
  50. 50. T 980x/T 982xTechnical Information1 Technical Data Electric Heating Gas Heating USA: EPWL 341 USA: EPWL 345 (single-board electronic) (single-board electronic) Electronic (1N1) Can be updated via optical PC interface installed standard Residual moisture sensing: conductivity test, residual moisture sensor (B3/1), 1-rib sampling Drying technology Insufficient air detection via heater bank NTC 2R30 and drying air NTC 1R30 Table 090-1: Technical Data2 Function2.1 Reversing (Electric) (T 980x) Reversing rhythm: 5 minutes clockwise (default direction), 1.5-second pause, 30 seconds running counterclockwise, 1.5-second pause. During the clockwise run, shortly before the pause, heating is reduced to a basic output of 1.9kW.2.2 Reversing (Gas) (T 982x) During the drying cycle, the gas dryer will not reverse for residual laundry moisture levels below 20%. For residual moisture levels greater than 20%, a maximum of 7 reversing cycles will take place. Reversing rhythm: 10 minutes running clockwise (default direction), 1.5- second pause and 30 seconds running counterclockwise. The burner is switched on at the start of the clockwise run, and it is switched off 4 seconds before the start of the counterclockwise run. During the counterclockwise run, the burner is always off.2.3 Dryer Function after a Power Interruption The dryer continues automatically at the point the program was interrupted.2.4 Programming Functions2.4.1 Resetting to Factory Settings Resets all programming options to their factory settings. Note: The reset takes effect immediately; its not possible to restore the previous settings! Operating hours are not reset. Not possible with service-department electronics. 50
  51. 51. T 980x/T 982x Technical Information2.4.2 Normal Drying Outcome (Residual Moisture) Drying can be set to more damp or more dry to suit the customers preference.2.4.3 Delicates Drying Outcome (Residual Moisture) Drying can be set to more damp or more dry to suit the customers preference. More Damp Standard More Dry Delicates 4% 2% 0% Table 090-2: Residual Moisture, Delicates2.4.4 Memory With the memory function activated, the extra features selected at the start of a program are saved. When the same program is selected again, these extra features are automatically called up.2.4.5 Additional Cooldown Phase Applies only to residual moisture programs. An extended cooldown time reduces the temperature of the laundry at program end. The result is that the laundry feels less damp. The cooldown time extension has no effect on timed drying programs.2.4.6 Prompt to Clean Air Ducts Operators can adjust the prompt to clean air ducts to suit their needs. For insufficient air detection, refer to Section 090-2.7.2.4.7 Acoustical Acknowledgment Set the acoustical tone to sound when a button is pressed.2.4.8 Conductivity Setting The conductivity of the damp laundry is evaluated and forms the basis of residual moisture sensing. For residual moisture sensing, refer to Section 090-2.5. Soft water does not conduct as well as hard water. In areas where soft water is used, the effect of soft water on residual moisture sensing can be compensated for with this programming function.2.4.9 Standby With standby activated, the panel LEDs and the drum light are dimmed after 5 minutes to save energy.2.5 Residual Moisture Sensing The electronic detects the conductivity in microsiemens (µS) of the laundry via residual moisture sensor B3/1. The residual moisture of the laundry is based on this measured conductivity value. 51
  52. 52. T 980x/T 982xTechnical Information2.6 Overriding the Time Control A fixed maximum time of approximately 180 minutes is imposed on all residual moisture drying programs at program start. After this time has elapsed, any drying program is stopped and the cooldown phase for faults is carried out. There is no anti-crease action, and no fault code is indicated, but the fault is saved and can be called up in service mode.2.7 Insufficient Air Detection The heater bank NTC (2R30) monitors the temperature increase in the heater bank. If the air paths are clogged during heating, the temperature in the heater bank rises rapidly. This is detected and the fault message Insufficient air is displayed. If the temperature at the heater bank NTC exceeds 356°F (180°C), fault code F66 (Leaking air) is issued.2.8 Operating Hours Counter The time is counted from program start to the end of cooldown, without the time for delay start and anti-crease action.2.9 Low-Voltage Detection SLC dryers have voltage-detection circuitry that will stop the dryer from running when voltage thresholds go too low. This can happen in certain areas of the country during periods of excessive heat and is commonly known as a brownout. In the gas model, voltage is measured between L1 and N (neutral). In the electric model, voltage is measured between L2 and N. Measuring between L1 and L2 (for 240VAC) will not be conclusive. If voltage drops below 102 volts AC, the dryer will shut itself down. The appliance cannot be restarted until the voltage reaches 108 volts AC. Since the voltage is polled at regular intervals, subsequent voltage dips may cause the dryer to shut off again. The motor can only run with sufficient supply voltage. Because the motor is mechanically linked to the fan, no air current is created when the motor is not running. The dryer will then overheat during heating and trip the circuit breaker. In order to avoid overheating, shut the dryer electronics off completely when they detect low voltage. This is the case when the supply voltage: - falls below the emergency threshold - falls below the lower low-voltage value for longer than one second - falls below the lower low-voltage value more than once in 10 seconds When the upper low-voltage value (see Table 090-3) has been reached, the dryer electronics may be switched back on. Emergency Threshold Lower Low Voltage Upper Low Voltage Forced appliance Secure appliance Secure appliance shutoff shutoff switch-on Tolerance: ± 1.5% of the Tolerance: ± 1.5% of the Tolerance: ± 1.5% of nominal voltage nominal voltage the nominal voltage USA < 102V - 3% of the > 108V - 3% of the < 80V (120V, 60Hz) nominal voltage nominal voltage Table 090-3: Values for Low-Voltage Detection 52
  53. 53. T 980x/T 982x Technical Information3 Fault Repair3.1 “End” LED Is Steadily Lit Symptom: This fault occurs in the normal operating mode (residual moisture programs only). Program stop, cooling air phase, intermittent buzzer tone. Opening and then closing the door deletes this fault message. Cause: The drum is empty, or loaded with only a few laundry items. The laundry is too dry. The residual moisture sensor (B3/1) voltage circuit is high-ohmic, and the residual moisture sensor has no-load detection; this is not a technical fault. For no-load detection, refer to Section 030-2.1. Remedy: Adjust the load, or switch to a timed program. Cause: Defective residual moisture sensor (B3/1). Remedy: Check the residual moisture sensor (B3/1) for low-ohmic (continuity) status; refer to Section 090-4.3.3.2 “Check Filter/Vent” LED Is Steadily Lit Symptom: Normal program run. Fault indication at the end of the cooling cycle. Insufficient air detection; refer to Section 090-2.7. Opening and closing the door deletes this fault code indication. Cause: Air paths are clogged. Remedy: Clean the lint filter (refer to the operating instructions). Clean the air paths in the dryer. Cause: The fault message Clean air paths is issued prematurely. Remedy: Reprogram the Clean air paths fault message indication; see the operating instructions or Section 090-4.1. 53
  54. 54. T 980x/T 982xTechnical Information3.3 “Check Filter/Vent” LED Flashes Rapidly Symptom: Program stop, cooling phase, buzzer sounds intermittently for 2 minutes. Fault code F66 (Leaking air fault) in the fault memory. Cause: Air paths are clogged. Insufficient air measurement; refer to Section 090-2.7. Remedy: Clean air paths. Delete the fault memory; refer to Section 090-4.3.3.4 “Rotary Iron” LED Flashes Symptom: Program stop, cooling phase, buzzer sounds intermittently for 2 minutes. Fault code F1 (Heater bank NTC short circuit) or F2 (Heater bank NTC open circuit) in the fault memory. Cause: Heater bank NTC short- or open-circuited. Remedy: Check the wires and connectors of heater bank NTC 2R30 for a short or open circuit. For heater bank NTC resistance values, refer to Table 030-3. Delete the fault memory; see Section 090-4.3.3.5 “Hand Iron” LED Flashes Symptom: Program stop, cooling phase, buzzer sounds intermittently for 2 minutes. Fault code F3 (Drying air NTC (1R30) short circuit) or F4 (Drying air NTC (1R30) open circuit) in the fault memory. Cause: Drying air NTC (1R30) open circuit (below 68°F); evaluation only after the heater has been running for at least 1 minute. Remedy: Check the wires and connectors of drying air NTC 1R30 for a short or open circuit. For drying air NTC resistance values, refer to Table 030-3. Cause: Heater bank is not heating. Unheated, the sensor is below the measuring threshold of 68°F (electric dryers only). Remedy: Check the heater element (R1) for a short or open circuit. Cause: Defective heater relay (K1/1) (electric dryers only). Remedy: Check the heater relay (K1/1). 54
  55. 55. T 980x/T 982x Technical Information Cause: Temperature limiter with manual reset (F1) has tripped (electric dryers only). Remedy: 1. Reset the temperature limiter. 2. Find and rectify the cause for the temperature limiter tripping. Cause: Gas burner is not heating (gas dryers only). Remedy: Check the burner; refer to Section 031-4.1.3.6 All Program LEDs Flash Symptom: No program start and no access to the programming or service mode. Cause: Demo mode is activated. Remedy: Deactivate the demo mode; refer to Section 090-4.2.3.7 F0: No Fault Cause: No fault is saved in the fault memory. Remedy: None.3.8 F1: Short Circuit in Heater Bank NTC (2R30) Symptom: Program stop, cooling phase, intermittent buzzer tone. Only the timed program “cold air” still works. The “Rotary iron” LED flashes. The “Check Filter/Vent” LED flashes. Opening and closing the door deletes this fault indication. Cause: Short circuit in heater bank NTC (above 480°F). Remedy: Check the wires and connectors of the heater bank NTC for a short or open circuit. For heater bank NTC resistance values, refer to Table 030-3.3.9 F2: Open Circuit in Heater Bank NTC (2R30) Symptom: Program stop, cooling phase, intermittent buzzer tone. Only the timed program “cold air” still works. The “Rotary iron” LED flashes. The “Check Filter/Vent” LED flashes. Opening and closing the door deletes this fault indication. 55
  56. 56. T 980x/T 982xTechnical Information Cause: Open circuit at heater bank NTC (below 68°F); evaluation only after the heater has been running for at least 1 minute. Remedy: Check the wires and connectors of heater bank NTC 2R30 for a short or open circuit. For heater bank NTC resistance values, refer to Table 030-3. Cause: Heater bank is not heating. Without heat, the sensor is below the measuring threshold of 68°F (electric dryers only). Remedy: Check the heater bank (R1) for a short or open circuit. Cause: Heater relay (K1/1) (electric dryers only). Remedy: Check the heater relay (K1/1). Cause: Temperature limiter with manual reset (F1) has tripped (electric dryers only). Remedy: Reset the temperature limiter. Find and rectify the cause for the temperature limiter tripping. Cause: Gas burner not heating (gas dryers only). Remedy: Check the gas burner; refer to Section 031-4.1.3.10 F3: Drying Air NTC (1R30) Short Circuit Symptom: Program stop, cooling phase, intermittent buzzer tone. Only the timed program “cold air” still works. The “Hand iron” LED flashes. The “Check Filter/Vent” LED flashes. Opening and closing the door deletes this fault indication. Cause: Short circuit (above 320°F) in drying air NTC 1R30. Remedy: Check the wires and connectors of drying air NTC 1R30 for a short or open circuit. For drying air NTC resistance values, refer to Table 030-3. 56
  57. 57. T 980x/T 982x Technical Information3.11 F4: Drying Air NTC (1R30) Open Circuit Symptom: Program stop, cooling phase, intermittent buzzer tone. Only the timed program “cold air” still works. The “Hand iron” LED flashes. The “Check Filter/Vent” LED flashes. Opening and closing the door deletes this fault indication. Cause: Open circuit (below 5°F) in the drying air NTC (1R30). Remedy: Check the wires and connectors of drying air NTC 1R30 for a short or open circuit. For drying air NTC resistance values, refer to Table 030-3.3.12 F50: Motor Stalls and Heater Is On for 3 Seconds Symptom: The motor (M5) stalls. Program stop, cooling phase, intermittent buzzer tone. Opening and closing the door deletes this fault indication. Cause: This is an internal electronic fault. Remedy: 1. Check the motor. 2. Replace the electronic.3.13 F55: Overriding Time Limit Exceeded Symptom: Only in residual moisture programs. Program stop, cooling phase, intermittent buzzer tone for 2 minutes. The “End” LED lights up steadily. The “Check Filter/Vent” LED lights up steadily. Opening and closing the door deletes this fault indication. The safety time has been exceeded; refer to Section 090-2.6. Cause: Laundry too wet, or dryer overloaded. Remedy: Spin the laundry more thoroughly in the washer, or reduce the laundry load. Cause: Laundry is electrically conductive (low-ohmic), due to a metal zipper, for example. Remedy: Run a timed warm-air program. Cause: Air path clogged. Remedy: Check and clean the air paths. 57
  58. 58. T 980x/T 982xTechnical Information Cause: Heater bank is not heating. Remedy: Check the heater element (R1) for a short or open circuit. Cause: Heater relay (K1/1). Remedy: Check the heater relay (K1/1). Cause: Temperature limiter (SOD, F2). Remedy: Check the temperature limiter (SOD, F2) for an open circuit. Cause: Defective residual moisture sensor (B3/1). Remedy: Residual moisture sensor (B3/1): Check the sampler. Check the residual moisture sensor (B3/1) voltage circuit for high ohmic (isolation) status; see Section 090-4.3.3.14 F66: Air Leakage Symptom: Program stop, cooling phase, intermittent buzzer tone for 2 minutes. Cause: Air paths clogged. Insufficient air measurement; refer to Section 090-2.7. Remedy: Clean the air paths.3.15 F98: No Gas Ignition (T 982x only) Symptom: Program stop, cooling phase, intermittent buzzer tone. Cause: The burner has not ignited after 10 attempts. Remedy: Check the following: - Gas supply is open - Gasline pressure is available - Exhaust passageway is clear - Gas jet is clear - Ignition electrode is functioning Note: In order to clear this fault message, open and close the door with the appliance switched on. 58
  59. 59. T 980x/T 982x Technical Information3.16 F99: Appliance Lockdown Symptom: The top 4 LEDs flash. Program stop, cooling phase, intermittent buzzer tone. Cause: F98 is often saved in the fault memory. If the electronic has registered an F98 fault 3 times, this generates an F99 fault and locks the machine. Remedy: To lift the lock, the diagnostic software (MDU) is required. Note: If the fault memory is not cleared, the lockdown remains activated.3.17 Laundry Is Overdried/F55 (Overriding Time Limit Exceeded) Symptom: Very long operating time. F 55 is stored in the fault memory. Cause: Short circuit at drum contact strip. A metal bracket of the drum contact strip is touching the drum casing and has caused a short circuit. Therefore, the electronics are detecting moisture, even though the laundry is already dry. Remedy: Insulate the bracket from the drum casing by placing an insulating sleeve (mat. no. 07244210) around the bracket. Note: In order to clear this fault message, open and close the door with the appliance switched on.3.18 Dryer Shuts Itself Off Symptom: Dryer shuts itself off suddenly during operation. No fault message; no additional symptoms. Cause: Not enough supply voltage available. See Section 090-2.9. Remedy: No remedy needed, because the electronics will switch the dryer on again when they have detected sufficient voltage. Cause: The electronic prematurely detects a low voltage. The values for low-voltage detection have been adjusted. For current low- voltage detection values, see Table 090-3. 59
  60. 60. T 980x/T 982xTechnical Information Remedy: Measure the input voltage to determine if the dryer has shut off in accordance with the values shown in the table. If possible, measure the voltage while a drying program is running and heating is switched on. If the dryer has shut off prematurely, replace the electronic.3.19 Top 4 LEDs Flash Symptom: Program stop, cooling phase, intermittent buzzer tone. Cause: Machine is locked. Remedy: See Section 090-3.16. Note: If the fault memory is not cleared, the lockdown remains activated.4 Service4.1 Programming Mode Summary Initial requirements: 1. End the current program as well as the demo mode. 2. Open the door. Accessing: Note: Access has to be completed within 10 seconds. 1. Press and hold the Start/Stop button. 2. Close the door. 3. As soon as the “Start/Stop” LED flashes, release the Start/Stop button. 4. Immediately press Start/Stop 5 times and on the 5th time hold it until the “Start/Stop” LED flashes rapidly (5 flashes per second). Acknowledgement indicator: “Start/Stop” LED flashes rapidly (5 flashes per second). If access is not successful, the machine will automatically revert to standard operating mode. Options: 1. Press the Buzzer button to select a programming function. 2. The “Buzzer” LED flashes to indicate the selected function. See Table 090-4. 3. Press the Start/Stop button to select options. 4. The “Drying” LED flashes to indicate the selected option. See Table 090-4. 60

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