Heating, Ventilation, and Air Conditioning

Electric A/C Compressor

~2min read

Troubleshooting

Malfunction Code Description of Malfunction Remedy

61
Compressor CAN Signal Malfunction
Compressor operating status error received
1. Check the high voltage and low voltage connector connection.
2. Check the condition of the low voltage connector terminals.
3. Check the condition of the vehicle inverter fuse.
4. Turn on the A/C, then check the compressor operation.
5. If it does not operate, replace the compressor.
62 Low voltage 1. Check the high voltage connector connection.
2. Check the condition of the vehicle inverter fuse.
3. Check the high voltage battery voltage level.
4. Turn on the A/C, then check the compressor operation.
5. If it does not operate, replace the compressor.
63 High voltage 1. Identify the vehicle model on the compressor.
2. Check the high voltage battery voltage level.
3. Turn on the A/C, then check the compressor operation.
4. If it does not operate, replace the compressor.
64 Overheat protection 1. Check the heat source in the engine compartment.
2. Check the A/C system for defects.
3. After 20 minutes, turn the ignition and A/C on, then check the compressor operation.
4. If it does not operate, replace the compressor.
65 Overload 1. Check the cooling fan operation.
2. Check the AAF (Active Air Flap) for a short circuit.
3. After 20 minutes, turn the ignition and A/C on, then check the compressor operation.
4. If it does not operate, replace the compressor.
66 Overcurrent protection
68 Missed restart
71 Stop failure due to excessive torque
67 Abnormal (not accepted) 1. Check the 12 V battery fuse.
2. Check the low voltage connector connection.
3. Check the FATC CAN connection.
4. If it does not operate, replace the compressor.
69 Thermistor malfunction 1. Check the thermistor and inspect it.
70 Thermistor short circuit
72 Short circuit current failure 1. Replace the compressor.
2. Check the vehicle inverter fuse (replace if necessary).
73 Driver voltage failure
74 Current measurement failure
75 Maximum temperature gradient failure
76 Internal error failure

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