Tech Sheet W10740573 RevB
FOR SERVICE TECHNICIAN'S USE ONLY
Voltage Measurement Safety Information
When performing live voltage measurements, you must do the following:
- Verify the controls are in the off position so that the appliance does not start when energized.
- Allow enough space to perform the voltage measurements without obstructions.
- Keep other people a safe distance away from the appliance to prevent potential injury.
- Always use the proper testing equipment.
- After voltage measurements, always disconnect power before servicing.
IMPORTANT: Electrostatic Discharge (ESD) Sensitive Electronics
ESD problems are present everywhere. Most people begin to feel an ESD discharge at approximately 3000V. It takes as little as 10V to destroy, damage, or weaken the main control assembly. The new main control assembly may appear to work well after repair is finished, but a malfunction may occur at a later date due to ESD stress.
- Use an anti-static wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance
-OR-
Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.
- Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted metal in the appliance.
- Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.
- When repackaging main control assembly in anti-static bag, observe above instructions.
IMPORTANT SAFETY NOTICE - 'For Technicians only'
This service data sheet is intended for use by persons having electrical, electronic, and mechanical experience and knowledge at a level generally considered acceptable in the appliance repair trade. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible, nor assume any liability for injury or damage of any kind arising from the use of this data sheet.
Contents
Diagnostic Guide .................................................. 2
Activating Service Diagnostic Test Modes ............. 2
Diagnostic Test Modes ..................................... 3-5
Customer Viewable Fault Codes ............................ 5
Service Fault / Error Codes ............................... 6, 7
Automatic Tests ................................................... 8
Manual Tests ........................................................ 9
Troubleshooting Guide .................................. 10, 11
Troubleshooting Tests................................... 12-18
Main Control Connectors & Pinouts .................... 12
Component Locations & Washer Specs .............. 19
Wiring Diagram .................................................. 20
DIAGNOSTIC GUIDE
Before servicing, check the following:
- Make sure there is power at the wall outlet.
- Has a household fuse blown or circuit breaker tripped? Was a regular fuse used? Inform customer that a time-delay fuse is required.
- Are both hot and cold water faucets open and water supply hoses unobstructed?
- Make sure drain hose is not sealed into drain pipe, and that there is an air gap for ventilation. Ensure drain height is between 39" (991 mm) and 8' (2.4 m) above the floor.
- All tests/checks should be made with a VOM (volt-ohm-milliammeter) or DVM (digital-voltmeter) having a sensitivity of 20,000 Ω per volt DC or greater.
- Resistance checks must be made with washer unplugged or power disconnected.
- IMPORTANT: Avoid using large diameter probes when checking harness connectors as the probes may damage the connectors upon insertion.
- Check all harnesses and connections before replacing components. Look for connectors not fully seated, broken or loose wires and terminals, or wires not pressed into connectors far enough to engage metal barbs.
- A potential cause of a control not functioning is corrosion or contamination on connections. Use an ohmmeter to check for continuity across suspected connections.
DIAGNOSTIC LED - MAIN CONTROL
A troubleshooting tool has been implemented onto the main control board-a diagnostic LED. LED ON - The Control is detecting correct incoming line voltage and the processor is functioning. LED OFF - Control malfunction. Perform TEST #1: Main Control, page 12, to verify main control functionality.
SERVICE DIAGNOSTIC TEST MODES
These tests allow factory or service personnel to test and verify all inputs to the main control board. You may want to do a quick and overall checkup of the washer with these tests before going to specific troubleshooting tests.
ACTIVATING THE SERVICE DIAGNOSTIC TEST MODES
- Be sure the washer is in standby mode (plugged in with all indicators off). NOTE: After initial power is applied, wait 10 seconds before activating Service Diagnostic Test Modes.
- Perform the following sequence of movement using the cycle selector knob. NOTE: AFTER RESET , sequence 'a' through 'e' must be completed within 6 seconds .
- RESET - Rotate cycle selector knob counterclockwise one or more clicks to clear sequence. L
- a. Rotate cycle selector knob clockwise one click and wait ½ second. R
- b. Rotate cycle selector knob clockwise one click and wait ½ second. R
- c. Rotate cycle selector knob clockwise one click and wait ½ second. R
- d. Rotate cycle selector knob counterclockwise one click and wait ½ second. L
- e. Rotate cycle selector knob clockwise one click. R
- Successful activation of Diagnostic Test Modes will be indicated by all status LEDs (except for Lid Locked) flashing ON and OFF in half-second intervals. NOTE: LED names may vary between makes and models.
Legend: = ON
= OFF
- If the status LEDs do not display as described above, the sequence may not have been completed within 6 seconds. Repeat step 2 to ensure this was not the cause. If still unsuccessful, see Unsuccessful Entry, page 3.
