Mutli Plus ODU Drive Board Troubleshooting

Fault Code	Fault Description	Possible Reason for Fault	Possible Remedies
1	Q axis current detection fault	Compressor wire connection is loose Bad driver board components Compressor start load is too large Compressor demagnetization Compressor oil shortage, weakened crankshaft Compressor insulation fault	Check the compressor wire connection Change the driver board Turn the machine one after pressure rebalancing Change compressor
2	Phase current detection fault	Compressor voltage default phase Bad driver board components Compressor insulation fault	Check the compressor wire connection Change the driver board Change the compressor
3	Initialization phase current imbalance	Bad driver board components	Replace driver board
4	Speed estimation fault	Bad driver board components Compressor shaft clamping Compressor insulation fault	Change the driver board Change the compressor
5	IPM FO output fault	System overload or current overload Driver board fault Compressor oil shortage; Weakened crankshaft Compressor insulation fault	Check the air-conditioner system Change the driver board Change the compressor
6	Communication between driver board and control board fault	Communication wire connection is loose Driver board fault Main control board fault	Check the communication wire Change the driver board Change the main control board
7	AC voltage overload	Supply voltage input too high or too low Driver board fault	Check the power supply Change the driver board
8	DC voltage overload	Supply voltage input too high Driver board fault	Check the power supply Change the driver board
9	AC voltage imbalance	Driver board fault	Replace the driver board
10	The PFC current detection circuit fault before the compressor is on	Bad driver board components	Replace the driver board
11	AC voltage supply in outrange	Power supply abnormal; power frequency out of range Driver board fault	Check the system Change the driver board
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