Wolf SO24 E Series Service Manual page 54

Troubleshooting
Troubleshooting Guide
Error Code Error
E71/F21 Short circuit in the
drive motor for the
water tank.
E72/F21 Open circuit in the
drive motor of the
water tank.
E74/F22 Retractable door
handle not initialized.
E75/F22
Retractable door
handle switch.
E76/F22 Short circuit retractable
door handle drive.
E77/F22 Open circuit retractable
door handle drive.
E78/F24 Sump pumping off
error.
E79/F27 Water inlet is not tight.
E80 Feed tank is not tight.
E81/F23
Evaporator draining
error.
E82/F10 Water leak in sump.
E84 Slider not initialized.
E85/F4 Short circuit in stepper
motor.
E86/F4 Open circuit in the
stepper motor.
827705 REVA 01/2019
Possible Cause Test/Action
1
2
3
1
2
3
Sequence errors E74, See E74, E75, E76, or E77.
E75, E76, and E77.
Switch on drive board 1
defective or not
2
mounted correctly.
1
2
3
1
2
3
Not applicable to Wolf products.
Not applicable to Wolf products.
Not applicable to Wolf products.
Level measure pin not
1
sensing the correct
2
level for the following
3
reasons:
Faulty level measure 4
pin.
5
Scale on the
6
evaporator is heavy.
7
The evaporator is full of
descaling solution.
The valve evaporator is
defective.
The drain pump is
defective.
A short circuit in the
drain pump or level
measure pin wiring.
Not applicable to Wolf products.
Sequence errors E85, See E85, E86, or E87.
E86, and E87.
1
2
3
4
1
53
E Series SO24 (SWS 13543126)
Check the wiring of the drive motor for the water
tank.
Replace the valve assembly.
Replace the relay board.
Check the wiring of the drive motor for the water
tank.
Replace the valve assembly.
Replace the relay board.
Inspect the retractable handle drive.
Replace the retractable handle drive.
Check the wiring of the retractable door handle
drive.
Replace the retractable door drive.
Replace the relay board.
Check the wiring of the retractable door handle
drive.
Replace the retractable door drive.
Replace the relay board.
Descale the unit.
Manually drain the evaporator.
Measure the resistance of the drain pump and
valve evaporator.
Check for a short circuit to the drain pump or
valve evaporator.
Replace the level measure pin.
Replace the relay board.
Replace the control board.
Inspect the stepper motor wiring.
Measure the resistance of the stepper motor.
Replace the stepper motor.
Replace the relay board.
Inspect the stepper motor wiring.
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