Whirlpool MFW 9700S, MFW 9600S manual Motor Control Unit Error

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DISPLAY			EXPLANATION AND RECOMMENDED PROCEDURE

		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
F/07		Possible Causes / Procedure
		1.	Unplug washer or disconnect power.
		2.	Check wire harness connections between the drive motor and the Motor Control Unit
			(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
F/09		Possible Causes / Procedure
		Possible Causes / Procedure
		1.	Check the drain hose and make sure it is not plugged or kinked.
		2.	Unplug washer or disconnect power.
		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.
F/10
F/10		Possible Causes / Procedure
		1.	Check for proper installation, verify the unit is not located near a source of heat and has
			proper ventilation.
		2.	Unplug washer or disconnect power.
		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.

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Contents Epic Forward Goals and ObjectivesTable of Contents Wiring Diagram Safety First GeneralSerial Number Model & Serial Number DesignationsModel Number Model & Serial Number Label Tech Sheet Locations Specifications Maytag Corporation Major Appliance Warranty Page 1234566541728919243 7937226757947867 93278675445627 75445627834473#678#87968258928 $4487968258928Electrician+ 1233456768479346724 2273$%&%*$% ,&## 2$&+1234546#2&%2$!#2 &-.0$$+&. /+2+$ &+&+$&#0 7878 388787 #$%2&&8$87Theory of Operation AIR Vent System Pressure Switch Motor Control Unit MCU TOUCHPAD/LED AssemblyCentral Control Unit CCU Drive MotorSuspension System Pump MotorECO Valve Interlock Switches Heating Element Temperature SensorDoor LOCK/SWITCH Assembly 971771997 7271792869795947679476 42OFF56789797797998234567896358769795947 3462869795947679475694878594587 Modifier6.76676567786676712345678938294587 682 123455367892234563789345647 7397826739868934345$747 #5&61234567 Sturdy colorfast fabrics12345678935 888 88#$89777 8977897779 77 7#### Ordisconnect83783power83783 1234567 35 37 5 67 123456376468with liquid detergent64326%9894 %2435263 8312345674674 9728879Component Access Component LocationsRemoving the Console and the Touchpad / LED Assembly To remove the consoleTo remove the touchpad / LED assem- bly Door Lock/Switch Assembly Bellows Retaining Wire On the next To remove the door lock/switch as- semblyTo remove the front panel and bellows Remove the end of the dispenser tube from the bellows Removing the Flowmeter Removing the Detergent Dispenser Motor & Assembly To remove the detergent dispenser motorTo remove the detergent dispenser as- sembly Removing the Inlet Valves Removing the Central Control Unit Removing the Interference Filter Removing the Pressure Switch Removing the Motor Controller Wire Standoff To remove the heating element Removing the Temperature Sensor Heating ElementTo remove the temperature sensor Removing the Drain Pump Assembly Removing the Airtrap Removing AN Interlock Switch Rotate Switch Up Switch Holder Locking Tabs Removing the Drive Motor Pivot Stud Removing the TUB and Basket Assembly Align Tabs With Slots Support Weight While Removing Front Slot Front Holes Rear Half Of Tub Basket Front Half Of Tub Reassembly Notes Page Component Testing Water Level Setting Test PointsMotor & Switch Detergent DispenserTo test the door lock/unlock solenoids To test the door switchTo test the door lock main switches Drain Pump Motor Interference FilterTemperature Results Interlock Switch Electrostatic Discharge ESD Sensitive Electronics DiagnosticsDiagnostic Guide FAILURE/ERROR Display Codes Display Explanation and Recommended ProcedureLong Drain Motor Control Unit Error Dispenser Circuit Error CCU / Touchpad / LED Assembly Error Sud Test Program Control Diagnostic TestStarting the Test Mode Manually Unlocking Door Lock System Water Temperature SensorMotor Continuity Test To reassemble CCU To remove the touchpad/LED assemblyTo remove Central Control Unit CCU To remove Motor Control Unit MCUTroubleshooting Chart ProblemDrum will Incorrect Page Wiring Diagram Page Product Specifications Warranty Information Sources United States