Miele Gas Dryer T9820 Service Manual

TECHNICAL INFORMATION
T 980x and T 982x Dryers (US Models)

© 2012 Miele USA

T 980x/T 982x

Technical Information
Table of Contents

A 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

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T 980x/T 982x

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

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T 980x/T 982x

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 Figures
Figure D-1: T 980x Component Layout ........................................................................... 10
Figure D-2: T 982x Component Layout ........................................................................... 11
Figure 010-1: Lid Removal .............................................................................................. 13
Figure 010-2: Front Panel Removal ................................................................................ 14
Figure 010-3: Side Panel Removal ................................................................................. 15
Figure 020-1: Door Removal ........................................................................................... 18
Figure 020-2: Door Lock Removal .................................................................................. 19

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T 980x/T 982x

Figure 030-1: Heater Bank Removal............................................................................... 25
Figure 030-2: Bearing Housing Attachment .................................................................... 26
Figure 030-3: Rear Bearing............................................................................................. 26
Figure 031-1: Gas Ignition Schematic ............................................................................. 30
Figure 031-2: Onset of Drying Process, Before Gas Starts to Flow................................ 30
Figure 031-3: Drying Process, After Gas Has Started to Flow ........................................ 31
Figure 031-4: Drying Process, Flowing Gas Ignites the Flame ....................................... 31
Figure 031-5: Drying Process after Flame Has Gone Out .............................................. 32
Figure 031-6: Port for Measuring Jet Pressure ............................................................... 34
Figure 031-7: Gas Regulation Valve ............................................................................... 35
Figure 031-8: Disconnecting the Gas Regulation Valve ................................................. 36
Figure 031-9: Attaching the Gas Connecting Line to the Gas Regulation Valve ............ 36
Figure 031-10: Tightening the Gas Regulation Valve ..................................................... 37
Figure 031-11: Gas Regulation Valve ............................................................................. 37
Figure 040-1: Fan Impeller Removal............................................................................... 42
Figure 050-1: Sealing Strip Installation ........................................................................... 45
Figure 050-2: Air Shield Removal ................................................................................... 46
Figure 050-3: Felt Seal Installation ................................................................................. 47
Figure 090-1: Removing the Fascia, Electronic, and Electronic Support Panel .............. 65
Figure 100-1: Fuse Replacement.................................................................................... 67

List of Tables
Table C-1: General Technical Data................................................................................... 9
Table 010-1: Casing Technical Data ............................................................................... 13
Table 020-1: Door Technical Data .................................................................................. 17
Table 030-1: Drum Data.................................................................................................. 21
Table 030-2: Heater Data................................................................................................ 21
Table 030-3: Heater Bank and Drying Air NTC Resistance Values ................................ 22
Table 031-1: Gas Heating Data ...................................................................................... 29
Table 040-1: Fan and Motor Data ................................................................................... 41
Table 050-1: Air Shield Data ........................................................................................... 45
Table 090-1: Technical Data ........................................................................................... 50
Table 090-2: Residual Moisture, Delicates ..................................................................... 51
Table 090-3: Values for Low-Voltage Detection.............................................................. 52
Table 090-4: Programming Mode Summary ................................................................... 61
Table 090-5: Service Mode Summary............................................................................. 64
Table 100-1: Electrical System Data ............................................................................... 67

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T 980x/T 982x

A Warning and Safety Instructions
1 General Information

Danger!
Danger of high voltages when working on small components.
In a single-board control, as in this appliance's 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.

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T 980x/T 982x

3 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.

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T 980x/T 982x

B 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
12/8/2006 Olaf Meyer zu Drewer Version 2
11/30/2006 Olaf Meyer zu Drewer Initial compilation

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T 980x/T 982x

C 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

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T 980x/T 982x

D Layout of Electrical Components
1 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

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T 980x/T 982x

2 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)

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T 980x/T 982x

010 Casing, Front Panel

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T 980x/T 982x

1 Technical Data
Upright, frame construction, side walls
Design
embossed for reinforcement
Table 010-1: Casing Technical Data

4 Service

4.1 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

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T 980x/T 982x


4.2 Removing the Front Panel
2. Remove the dryer lid; refer to Section 010-4.1.
3. Remove the fascia, the electronic, and the electronic's 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
8. Disconnect the door lock Molex connection.
9. Pull the front panel upwards to remove.

Figure 010-2: Front Panel Removal

4.3 Side Panel Removal
2. Remove the lid; refer to Section 010-4.1.
3. Remove the front panel; refer to Section 010-4.2.

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T 980x/T 982x

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.

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T 980x/T 982x

020 Door, Lock

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T 980x/T 982x

1 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 Data

2 Function
2.1 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 Service

4.1 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.

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T 980x/T 982x


Figure 020-1: Door Removal

4.2 Door Hinge Removal
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.

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T 980x/T 982x

4.4 Removing the Door Lock
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

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T 980x/T 982x

030 Drum, Rear Bearing, Residual Moisture Sensor,
Heater Bank

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T 980x/T 982x

1 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

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T 980x/T 982x


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 Values

2 Function
2.1 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 drum's rotating angle
(centrifugal force, rib contact).

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T 980x/T 982x

2.3 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 Repair

3.1 Temperature Limiter with Manual Reset (F1) Has Tripped
Symptom:
The temperature limiter has tripped repeatedly.
Cause:
Clogged lint screen.
Remedy:
Clean the lint screen.

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T 980x/T 982x

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 Service
4.1 Heater Bank Removal (T 980x)
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.

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T 980x/T 982x


Figure 030-1: Heater Bank Removal

4.2 Rear Bearing Removal
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).

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T 980x/T 982x


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

T 980x/T 982x

4.3 Residual Moisture Sensor Removal
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
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

T 980x/T 982x

031 Gas Heating (T 982x)

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T 980x/T 982x

1 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 Data

2 Function
2.1 Gas Unit

2.1.1 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.

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2.1.2 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

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T 980x/T 982x

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.

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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.

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4 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.

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T 980x/T 982x

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 it's 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.

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4.2 Removing the Gas Solenoid
1. Disconnect the machine from the power and gas supplies.
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.

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T 980x/T 982x


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

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T 980x/T 982x

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.


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T 980x/T 982x

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.
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.


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T 980x/T 982x

4.5 Installing the Gas Burner
1. Secure the burner with a screw. See Figure 031-13.

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.

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T 980x/T 982x

040 Motor, Fan

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T 980x/T 982x

1 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 Data

4 Service
4.1 Fan Impeller Replacement
3. Remove the fascia, the electronic, and the electronic's support panel; refer
to Section 090-4.4.
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.

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T 980x/T 982x


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 electronic's 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.

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4.2 Motor Replacement
3. Remove the fascia, the electronic, and the electronic's support panel; refer to
Section 090-4.4.
6. Unhook the spring from the intermediate drive notch (located directly below the
drum belt).
7. Release the drum belt.
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.
24. Reconnect the machine to the power supply and test it for correct operation.

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T 980x/T 982x

050 Air Shield, Front Bearing

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T 980x/T 982x

1 Technical Data
Filter Flat filter
Drying air temperature sensor NTC (1R30)
Table 050-1: Air Shield Data

3 Fault Repair
3.1 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:
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

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T 980x/T 982x

4 Service
4.1 Air Shield Removal
3. Remove the fascia, the electronic, and the electronic's support panel;
refer to Section 090-4.4.
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
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

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T 980x/T 982x


4.2 Felt Seal Replacement
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.
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 o'clock position).
See Figure 050-3.
8. Staple the felt seal at the 12, 4 and 8 o'clock 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

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T 980x/T 982x

reverse order.
12. Hook the tension spring back onto the intermediate drive notch, using
needlenose pliers if necessary.
16. Reconnect the machine to the power supply and test it for correct
operation.

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090 Fascia Panel, Electronic

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1 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 Data

2 Function
2.1 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 Functions

2.4.1 Resetting to Factory Settings
Resets all programming options to their factory settings.

Note:
The reset takes effect immediately; it's not possible to restore the previous settings!
Operating hours are not reset.
Not possible with service-department electronics.

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T 980x/T 982x

2.4.2 Normal Drying Outcome (Residual Moisture)
Drying can be set to more damp or more dry to suit the customer's preference.

2.4.3 Delicates Drying Outcome (Residual Moisture)
Drying can be set to more damp or more dry to suit the customer's preference.

More Damp Standard More Dry
Delicates 4% 2% 0%
Table 090-2: Residual Moisture, Delicates

2.4.4 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.

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2.6 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

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3 Fault Repair

3.1 “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.

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3.3 “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:
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:
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).

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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.

3.9 F2: Open Circuit in Heater Bank NTC (2R30)
Symptom:
The “Rotary iron” LED flashes.

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T 980x/T 982x

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.
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:
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:
The “Hand iron” LED flashes.
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.

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3.11 F4: Drying Air NTC (1R30) Open Circuit
Symptom:
The “Hand iron” LED flashes.
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.

3.12 F50: Motor Stalls and Heater Is On for 3 Seconds
Symptom:
The motor (M5) stalls.
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.
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

T 980x/T 982x

Cause:
Heater bank is not heating.
Remedy:
Check the heater element (R1) for a short or open circuit.
Cause:
Heater relay (K1/1).
Remedy:
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:
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

T 980x/T 982x

3.16 F99: Appliance Lockdown
Symptom:
The top 4 LEDs flash.
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

T 980x/T 982x

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:
Cause:
Machine is locked.
Remedy:
See Section 090-3.16.
Note:
If the fault memory is not cleared, the lockdown remains activated.

4 Service
4.1 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

T 980x/T 982x

Warning!
For the dryer to function properly, specific options for the country it is
operating in have to be selected.
The appropriate electronic must be installed.
Factory settings are indicated in bold.

Programming Function Option
“Buzzer” LED long short “Drying” LED short
adapted options 0
Reset, refer to Section
-- 1 delivery
090-2.4.1 1
condition

more damp 0
Normal drying
outcome (residual
-- 2 standard 1
moisture), refer to
Section 090-2.4.2
more dry 2

more damp 0
Delicates drying
outcome (residual
-- 3 standard 1
moisture), refer to
Section 090-2.4.3
more dry 2

off, memory
function not 0
Memory, refer to activated
-- 6
Section 090-2.4.4 on, memory
function 1
activated
off 0
Additional cooldown
phase, refer to -- 7 5 min 1
Section 090-2.4.5
10 min 2
off 0
Insufficient air alert, more sensitive 1
refer to Section 090- 1 --
2.4.6 standard 2
less sensitive 3
Button tones, refer to off 0
1 1
Section 090-2.4.7 on 1
Conductivity setting, normal 0
refer to Section 090- 1 2
2.4.8 low (<150µS) 1

Standby, refer to off 0
1 3
Section 090.2.4.9 on 1
Table 090-4: Programming Mode Summary

61

Miele Gas Dryer T9820 Service Manual

Miele Gas Dryer T9820 Service Manual

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