Service Manual

2-8
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Whirlpool Smart All-In-One Washer & Dryer
DIAGNOSTICS & TROUBLESHOOTING
For Service Technician Use Only




 Dry thermistor NTC open or shorted See TEST #12b: Dry Thermistor Sensor, pg. 3-20.
 Wash heater relay error See TEST #8: Wash Heang Element, pg. 3-12.
 Dry heater relay error See TEST #12a: Dry Heang Element, pg. 3-19.
 Dry fan motor error See TEST #13: Dry Fan Motor, pg. 3-21.
 Door switch error See TEST #4: Door Lock System, pg. 3-8.
 Lock failure See TEST #4: Door Lock System, pg. 3-8.
 Unlock failure See TEST #4: Door Lock System, pg. 3-8.
 Door not open error Make sure to open and close the washer/dryer door
between cycles.
 Communicaon between the Appliance
Control Unit (ACU) and Motor Control Unit
(MCU) has not been detected.
Try recycling power to washer/dryer.
• Verify connuity in cable between ACU (JI7) and MCU
(J3). See wiring diagram on page 3-3.
• Check AC and DC supplies. See TEST #1 (ACU Power
Check) on page 3-4.
• See TEST #2 Human Machine Interface on page 3-6.
 Communicaon between the Appliance
Control Unit (ACU) and Human Machine
Interface (HMI) has not been detected.
Try recycling power to washer/dryer.
• Verify connuity in cable between ACU (J16) and HMI
(CN1). See wiring diagram on page 3-3.
• Check AC and DC supplies. See TEST #1 (ACU Power
Check) on page 3-4.
• See TEST #2 Human Machine Interface on page 3-6.
 Unknown cycle ID error See TEST #1: ACU Power Check, pg. 3-4.
 MCU over temp error
• Check for obstrucon between spin basket and outer tub.
• Check harness connuity and connecons between ACU
and motor. See TEST #3: Motor Circuit, pg. 3-7.
 MCU over current error/internal failure. See TEST #3: Motor Circuit, pg. 3-7.
 Motor disconnected error Check harness connuity and connecons between ACU and
motor. See TEST #3: Motor Circuit, pg. 3-7.
 Motor over temp error • Check for obstrucon between spin basket and outer tub.
• Check harness connuity and connecons between ACU
and motor. See TEST #3: Motor Circuit, pg. 3-7.
 Locked rotor See TEST #3: Motor Circuit, pg. 3-7.
 Inlet valve error/ll meout See TEST #5: Inlet Valve, pg. 3-9.
 Overow Make sure drain hose and drain pump lter are not plugged.
Verify funconality of water inlet valve, water level sensor,
and drain/recirculaon pump.
• See TEST #5: Inlet Valve, pg. 3-9.
• See TEST #6: Pressure Switch, pg. 3-10.
• See TEST #7: Drain/Recirculaon Pump, pg. 3-11.
 Long drain/drain meout Check drain hose installaon for proper height, check drain
hose and lter for obstrucons, and make sure drain hose
is not sealed into drain pipe. Check funconality of drain/
recirculaon pump.
• See TEST #7: Drain/Recirculaon Pump, pg. 3-11.