92 PB
TROUBLESHOOTING
Diagnostic Codes -Drive Faults 48-60k
Fault
code
Fault description Possible reasons for abnormality How to deal with
1
Q axis current detection, failure in drive
control
1. Compressor wire is not connected
properly;
2. Bad driver board components;
3. Compressor start load is too large;
4. Compressor de‑magnetization;
5. Compressor oil shortage serious wear of
crankshaft;
6. The compressor insulation fails.
1. Check the wire of the compressor;
2. Change the driver board ;
3. Turn on the machine after the pressure
is balanced again;
4. Change the compressor;
5. Change the compressor;
6. Change the compressor.
2
Phase current detection failure in drive
control
1. Compressor voltage default phase;
2. Bad driver board components;
3. The compressor insulation fault.
1. Check compressor wire connection;
2. Change the driver board;
3. Change the compressor.
3 Initialization, phase current imbalance Bad driver board components. Change the driver board .
4 Speed estimation, failure in drive control
1. Bad driver board components;
2. Compressor shaft clamping;
3. The compressor insulation fails.
1. Change the driver board ;
2. Change the compressor ;
3. Change the compressor .
5 IPM FO output fault
1. System overload or current overload.
2. Driver board fails;
3. Compressor oil shortage,serious wear of
crankshaft;
4. The compressor insulation fault.
1. Check the air conditioner system;
2. Change the driver board;
3. Change the compressor;
4. Change the compressor.
6
Communication between driver board and
control board fault
1. Communication wire is not connected
well;
2. Driver board fault;
3. Control board fault;
1. Check compressor wire connection.
2. Change the driver board;
3. Change the control board ;
7 AC voltage,overload voltage
1. Supply voltage input is too high or too
low;
2. Driver board fails;
1. Check power supply;
2. Change the driver board;
8
DC voltage,overload
voltage
1. Supply voltage input is too high ;
2. Driver board fault;
1. Check power supply;
2. Change the driver board;
9 AC voltage imbalance Driver board fails; Change the driver board;
10
The PFC current detection circuit fault
before compressor is ON
Bad driver board components; Change the driver board
11 AC voltage supply in out range
1. Power supply abnormal, power frequency
out of range;
2. Driver board fails;"
1. Check the system;
2. Change the driver board;
12
Products of single‑phase PFC over‑current,
FO output low level
1. System overload, current is too large;
2. Driver board fault;
3. PFC fault.
1. Check the system;
2. Change the driver board;
3. Change PFC.
Inverter over current (3‑phase power
supply air conditioners)
1. System overload, current is too large;
2. Driver board fault;
3. Compressor oil shortage, serious wear of
crankshaft;
4. The compressor insulation fault.
1. Check the system;
2. Change the driver board;
3. Change the compressor;
4. Change the compressor.
13 Inverter over current
1. System overload, current is too large;
2. Driver board fault;
3. Compressor oil shortage, serious wear of
crankshaft;
4. The compressor insulation fault.
1. Check the system;
2. Change the driver board;
3. Change the compressor;
4. Change the compressor.
14
PFC over current (single‑phase air‑
conditioner)
1. System overload, current is too large;
2. Driver board fault;
3. PFC fault.
1. Check the system;
2. Change the driver board;
3. Change PFC.
Phase imbalance or phase lacks or the
instantaneous power failure (only for
3‑phase power supply air conditioners)
1. 3‑Phase voltage imbalance;
2. The 3‑phase power supply phase lost;
3. Power supply wiring is wrong;
4. Driver board fault.
1, Check the power supply;
2. Check the power supply;
3. Check the power supply wiring
connection;
4. Change the driver board.
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