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 Mode ...................... 2

Key Activation & Encoder Test .............................. 3

Service Test Mode ............................................ 3-6

Software Version Display ...................................... 7

Fault & Error Codes ........................................ 7-10

Troubleshooting Guide .................................. 11-13

Troubleshooting Tests................................... 14-20

Main Control Connectors & Pinouts .................... 14

Component Locations ........................................ 21

Wiring Diagram .................................................. 22

FOR SERVICE TECHNICIAN'S USE ONLY

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