Friedrich AS - W126BMS0, Service Manual

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Part 4 Trouble Shooting
Turn on the main power.
When in air circulation mode, compressor/outdoor fan is stopped.
Turn off main power.
Check the electrical wiring diagram of Outdoor side.
Check the open or short of connecting wires between Indoor and Outdoor.
Check the sensor for Indoor temperature is attached as close as to be effected by the tem-
perature of Heat Exchange (EVA.)
When displaying Error code, refer to the trouble shooting guide.
Check the main power source.(AC 208V~230V)
Check the trouble shooting guide error code 21,26.
Check that CN_FAN(A,B) supplied voltage to outdoor PCB is about AC 208V~230V.
Check that whether the housings and harnesses would be separated when there are
attempts to disconnect those.
Check to pull with hands directly to the harness.
No harness should be divided from the housing.
Operate Cooling Mode by setting the desired temperature of the remote controller is less
than one of the Indoor temperature by 1°C at least.
The Compressor/Outdoor Fan don't operate
Trouble 3