Carrier xpower blue II 38KCL109313G - 9.2.8 Inverter compressor drive error diagnosis and solution; 9.2.9 Zero crossing detection error diagnosis and solution

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9.2.8 Inverter compressor drive error diagnosis and solution
9.2.9 Zero crossing detection error diagnosis and solution
Check if the connections and
power supply is normal?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor PCB is defective.
Replace indoor PCB.