Key Parts Checking - Carrier 42LUVH025N Service Manual

9.2.10 P4(inverter compressor drive error) diagnosis and solution.
Is the connection of
compressor good? Is
the wiring sequence
Replace
If the problem comes
to again, check coil
resistance of inverter

9.3 Key parts checking.

9.3.1. Compressor checking
Model: DA108X1C-20FZ3
Measure the resistance value of each winding by using the multi-meter.
Model: DA130S1C-20FZ
Measure the resistance value of each winding by using the multi-meter.
37
YES
the outdoor
NO
Reconnect and retry
NO
Replace
Position
Blue - Red
Blue - Black
Red - Blue
Position
Blue - Red
Blue - Black
Red - Blue
inverter
Resistance Value
0.71Ω
(20 )
Resistance Value
0.95Ω
(20 )