Carrier 38LUVH065N-1 - Key Component Checking Procedures

PART7, 6
2.8 Inverter compressor drive error diagnosis and solution
2.9 Zero crossing detection error
This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the
main control board must have fault.
3. Key parts checking
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.
Position
Resistance Value
Blue - Red
0.71Ω
(20℃)
Blue - Black
Red - Blue
Position
Resistance Value
Blue - Red
0.95Ω
(20℃)
Blue - Black
Red - Blue
Yes
Replace the outdoor unit PCB
Replace inverter compressor.
Reconnect and retry
No
No
Is the connection of compressor good?
Is the wiring sequence right? The voltage
range proper?