Whirlpool WTW7120HC Manual De Instrucciones

DANGER
Only authorized technicians should
perform diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can
result in death or electrical shock.
When performing live voltage measurements, you must do the following:
Ƀ Verify the controls are in the off position so that the appliance does not start when energized.
Ƀ Allow enough space to perform the voltage measurements without obstructions.
Ƀ Keep other people a safe distance away from the appliance to prevent potential injury.
Ƀ Always use the proper testing equipment.
Ƀ 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 3000 V. It takes as
little as 10 V 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.
Ƀ Use an anti-static wrist strap. Connect wrist strap to green earth connection point or unpainted metal in the
appliance.
Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.
Ƀ Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted
metal in the appliance.
Ƀ Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.
Ƀ When repackaging main control assembly in anti-static bag, observe above instructions.
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.
Service Guide................................................................................. 2
Activating Service Mode ................................................................. 2
Component Activation Function Chart ............................................ 5
Sensor Feedback Function Chart .................................................... 6
Diagnostics Cycle Chart ................................................................. 7
Faults & Error Codes ................................................................ 8-10
W11197745B
FOR SERVICE TECHNICIAN'S USE ONLY
Voltage Measurement Safety Information
IMPORTANT SAFETY NOTICE - "For Technicians only"
- OR -
Contents
Troubleshooting Guide ............................................................ 11-13
Main Control (ACU) Board, Connectors and Pinouts ...................... 14
Troubleshooting Tests............................................................. 15-20
Troubleshooting Guide for Connected Washer ............................... 20
Component Location ................................................................... 24
1