KitchenAid KHWS01PMT / WH Technical Education page 70

DISPLAY
MOTOR CONTROL UNIT ERROR
The main control has detected a short in the Motor Control Unit. If a failure occurs during
high-speed spin, the door will be unlocked after three minutes.
F/07
Possible Causes / Procedure
1. Unplug washer or disconnect power.
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2. Check wire harness connections between the drive motor and the Motor Control Unit
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(MCU), and between the MCU and the Central Control Unit (CCU).
3. Plug in washer or reconnect power.
4. Check the MCU by looking for operations of the drive motor.
5. Check the drive motor for powered rotations.
OVERFLOW CONDITION
If the overflow contact on the pressure switch is closed for more than 60 seconds, an Overflow
Condition will occur. In an overflow condition, the door remains locked and the drain pump
runs constantly, even if PAUSE/CANCEL is pressed twice and the display is cleared. Turn off
hot and cold water faucets and unplug the unit before servicing.
F/09
Possible Causes / Procedure
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1. Check the drain hose and make sure it is not plugged or kinked.
2. Unplug washer or disconnect power.
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3. Check wire harness connections to the drain pump, pressure switch, and Central Control
Unit (CCU).
4. Check/clean drain pump filter of foreign objects.
5. Check for drain pump failure.
6. Check the inlet valve for proper shut off.
7. Check the pressure switch for proper operation.
MOTOR CONTROL UNIT (MCU) HEAT SINK THERMAL TRIP
If the thermal protector on the MCU heat sink gets too hot, it will open the thermal protector
on the heat sink which will stop motor functions and an "F/10" will be displayed.
Possible Causes / Procedure
F/10
1. Check for proper installation, verify the unit is not located near a source of heat and has
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proper ventilation.
2. Unplug washer or disconnect power.
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3. Check wire harness connections to the MCU, the motor, and Central Control Unit (CCU).
4. Check the drive system for any worn or failed components.
5. Plug in washer or reconnect power.
6. Check the MCU by looking for operations of the drive motor.
7. Check the drive motor for powered rotations.
EXPLANATION AND RECOMMENDED PROCEDURE
6-4