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
COMPONENT TESTING
Whirlpool Smart All-In-One Washer & Dryer
n
3-19
For Service Technician Use Only
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.
TEST #12a: Dry Heang Element
This test checks the dry heang element, wiring, and ACU.
1. Unplug washer/dryer or disconnect power.
2. Gently lay washer/dryer on its right side to access the
ACU. Remove AC shield and ACU cover.
3. Disconnect connector J10 from the ACU.
4. Using an ohmmeter, measure the resistance across pins 1
and 2 of connector J10.
¾ If the resistance is 30–50 Ω, the heang element and
wiring are good; go to step 8.
¾ If the resistance is open, go to step 5.
5. Remove top panel to access the dry heang element.
6. Disconnect the wire connectors from the dry heang
element. See Figure 1.
7. Using an ohmmeter, measure the resistance across the
two heang element terminals.
¾ If the resistance is 30–50 Ω, the dry heang element is
good; go to step 8.
¾ If the resistance is far out of range or open, replace the
Heater Channel Assembly. NOTE: The heater element
cannot be replaced separately from the Heater Channel
Assembly.
Dry Heang
Element
Figure 1 - Dry Heating Element
8. Check thermal cutos.
¾ Check connuity of the thermal cuto on the L1 side of
the harness.
¾ Check connuity of the thermal cuto on the L2 side of
the harness.
¾ Each thermal cuto has a “reset” buon. If either
thermal cuto is open, and cannot be reset, replace
the thermal cuto (see Figure 2). NOTE: Apply thermal
grease/paste when replacing thermal cuto.
Reset Buon
Figure 2 - Resettable Thermal Cutoffs (TCO’s)
9. Check harness connuity between the J10 on the ACU and
the two thermal cutos.
¾ If the harness shows open, replace main harness.
¾ If harness connuity is good, go to step 10.
10. If the preceding steps did not correct the heang element
problem, replace the ACU.
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.
Figure 3 - Dry Heating Element Strip Circuit
DRY HEATING ELEMENT
ACU
DRY HEATING ELEMENT
ACU
DRY HEATING ELEMENT
L1
J1-2
L2
J1-1
J10-1
J10-2
L1 - HEATER RELAY L2 - HEATER RELAY
H
30 - 50 ohms
TCOTCO
RFI-L
RFI-N