Midea MS9V-18HRDN1-QC2(B) 9V SERIES - Page 45

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9.2.6 P0 (IGBT over-strong current protection) diagnosis and solution.
9.2.7 P1 (over voltage or too low voltage protection) diagnosis and solution.
Is the power supply good?
Replace the outdoor e-box.
Make sure the power supply is normal.
YES
NO
YES
Fastening the IPM to the radiator
NO
Check whether the connections between
outdoor PCB and IPM are good?
Check whether the IPM is fixed to radiator
tightly or if the fastening reliable
Replace the IPM
The unit does not work normally
Replace the compressor