Wolf CSO24TE/S - Troubleshooting - Error Codes E74-E87

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