Service Manual
Table Of Contents
- Smart All-In-One Washer/Dryer
- Table of Contents
- Section 1: General Information
- Washer & Dryer Safety
- Introduction
- Features
- Options
- Accessories
- Control Panel & Features
- Control Panel - Tools
- Load & Go Bulk Dispenser
- Theory of Operation - Dry Cycle
- Product Specifications
- Wiring Diagram & Model/Serial Number Location
- Model & Serial Number Nomenclature
- All-In-One Washer/Dryer Maintenance
- Cleaning the Drain Pump Filter/Draining Residual Water
- How to Manually Open a Locked Door
- Section 2: Diagnostics & Troubleshooting
- Section 3: Component Testing
- Component Testing Safety
- Wiring Diagram
- TEST #1: Appliance Control Unit (ACU) Power Check
- TEST #2: Human-Machine Interface (HMI)
- TEST #3: Motor Circuit
- TEST #4: Door Lock System
- TEST #5: Inlet Valve
- TEST #6: Pressure Switch
- TEST #7: Drain/Recirculation Pump
- TEST #8: Wash Heating Element
- TEST #9: Wash Temperature Sensor
- TEST #10a: Dispenser Sensing
- TEST #10b: Dispenser Metering Pumps
- TEST #11: Supply Connections
- TEST #12a: Dry Heating Element
- TEST #12b: Dry Temperature Sensor
- TEST #13: Dry Fan Motor
- Section 4: Component Access
- Removing the Door Assembly
- Removing the Top Panel
- Replacing the Human-Machine Interface (HMI)
- Removing the Front Panel & Bulkhead
- Removing the Rear Access Panel
- Removing the Inlet Valve Assembly
- Removing the Pressure Switch
- Removing the Metering Pumps
- Removing the Detergent Dispenser
- Removing the Dryer Heating Channel Assembly
- Removing the Condenser Duct Assembly
- Removing the RFI Filter
- Removing the Door Lock Assembly
- Removing the Appliance Control Unit (ACU)
- Removing the Motor Control Unit (MCU)
- Removing the Heater & Thermistor
- Removing the Drain & Recirculation Pumps
- Removing the Direct Drive Motor
- Removing the Tub Assembly
- Section 5: Connectivity
- Product Specifications & Warranty Information Sources
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Whirlpool Smart All-In-One Washer & Dryer
COMPONENT TESTING
For Service Technician Use Only
TEST #4: Door Lock System
Check the relays and electrical connecons to the door lock by
performing the Service Diagnosc Mode Tests on page 2-3. The
following steps assume the door cannot lock or unlock during
that test. Perform the following checks if the washer does not
lock (or unlock).
1. Check door lock mechanism for obstrucon or binding.
Repair as necessary.
2. Unplug washer/dryer or disconnect power.
3. Gently lay washer/dryer on its right side to access the
ACU. Remove AC shield and ACU cover.
4. Visually check that the J2 (door switch) connector is
inserted all the way into the ACU.
¾ If visual check passes, go to step 5.
¾ If any of the connectors are not inserted properly,
reconnect and retest door lock.
5. Disconnect the J2 connector from the ACU. NOTE: To
measure the door lock switch in the “locked” posion, plug
in washer/dryer or reconnect power. Press the POWER
buon, select any cycle, and then press START. Actuaon
of the door lock solenoid should be heard. At that point,
unplug the washer/dryer and disconnect J2 from the ACU
and measure resistance across pins (ACU side) according to
the following chart:
Component Resistance Contacts Measured
Door Switch Door Open =
Open Circuit
Door Closed =
~170 ohms
J2-2 J2-3
Lock Switch Locked =
0 ohms
Unlocked =
Open Circuit
J2-1 J2-2
Lock Solenoid ~170 ohms
with door closed
J2-2 J2-3
¾ If resistance values are good, go to step 6.
¾ If any of the measurements are out of range, check the
harness of the suspected component between the ACU
and door lock mechanism for connuity.
¾ If the harness and connecons are good, replace the
door lock mechanism. IMPORTANT: To minimize risk
of damage to door lock/switch wires, remove the door
lock mechanism screws before removing the front panel.
6. If the preceding steps did not correct the lock problem,
replace the ACU and retest door lock mechanism.
¾ Unplug washer/dryer or disconnect power.
¾ Replace the ACU.
¾ Reassemble all parts and panels.
¾ Perform the Service Diagnosc Mode Tests on page 2-3
to verify repair.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Failure to do so can result in death or
electrical shock.
Replace all parts and panels before operating.
Figure 1 - Door Lock Strip Circuit
DOOR LOCK SYSTEM
ACU
DOOR LOCK ASSEMBLY
DOOR LOCK ASSY
LOCK SWITCH
DOOR SWITCH
LOCK SOLENOID
~170 ohms
J2-3
J2-2
J2-1
3
2
1