Whirlpool GHW9100L Service Manual page 49

DISPLAY
F/06
Drive Motor Tachometer Error
The control is unable to properly detect motor speed and the machine will shut down.
If a failure occurs during high-speed spin the door will be unlocked after 3 minutes.
Potential Causes
• Check wire harness connections between the Drive Motor/Tachometer and the
Motor ControlUnit (MCU), and between the MCU and the Central Control Unit
(CCU)
• Check the Drive Motor
• Check the MCU
• Check the Wire Harness
Motor Control Unit Error
F/07
Central Control Unit
The
occurs during high-speed spin the door will be unlocked after 3 minutes.
Potential Causes
• Check wire harness connections between the Drive Motor and the Motor Control
Unit (MCU), and between the MCU and the Central Control Unit (CCU)
• Check the MCU
• Check the Drive Motor
• Check the Wire Harness
Overflow Condition
F/09
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 will remain
locked, and the Drain Pump will run constantly, even if PAUSE/CANCEL is pressed
twice and the Display is cleared. Unplug the unit to service.
Potential Causes
• Check the drain hose and make sure it is not plugged or kinked
• Check Wire Harness connections to the Drain Pump, Pressure Switch, and
Central Control Unit (CCU)
• Check/ Clean Drain Pump Filter of foreign objects
• Check for Drain Pump Failure
• Check the Inlet Valve for proper shut off
• Check the Pressure switch for proper operation
F/10 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.
Potential Causes
• Check for Proper Installation, verify the unit is not located near a source of heat
and has proper ventilation.
• Check Wire Harness connections to the MCU, the motor, and Central Control
Unit (CCU)
• Check the Drive system for any worn or failed components
• Check MCU
• Check Motor
ERROR CODES
EXPLANATION AND RECOMMENDED PROCEDURE
has detected a short in the motor control unit. If a failure
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