Friedrich WallMaster WCVT12B30A Handleiding (90 Pagina's)

Handleiding

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COMPONENTS TESTING

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or

installation. Extreme care must be used, if it

becomes necessary to work on equipment with

power applied.

Failure to do so could result in serious injury or

death.

Thermistors Description

The units have 4 sensors (Thermistors). Each thermistor is color coded

and has a different function.

1. Indoor Coil (Yellow) - located on the evaporator coil.

2. Outdoor Coil (Blue) - located on the condenser coil.

3. Discharge Air (Black) - located on the front of the unit in the

discharge air port.

4. Ambient Air (White) - located on the front of the unit in front of

the air intake.

Thermistor Testing

1. Gain access to Main PCB (Refer to Main PCB Replacement.

For Kuhl

For Kuhl Q

For Wallmaster

2. Locate thermistor plug and disconnect from Main PCB. (Refer

to Control Board Identication, Fig 711)

3. Check for proper resistance. (Refer to Thermistor Resistance

values).

4. If thermistor is out of tolerance, replace thermistor.

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