Troubleshooting 36
8.6 PC 00(IPM malfunction diagnosis and solution)&(IDU)PC 04(Inverter compressor drive
error diagnosis and solution)
Description: PC 00/(ODU)P6:When the voltage signal the IPM sends to the compressor drive chip is abnormal, the LED
displays the failure code and the AC turns off.
(IDU)PC 04:The driven chip cannot detect the right rotor position of compressor
Recommended parts to prepare:
• Connection wires
• IPM module board
• Outdoor fan assembly
• Compressor
• Outdoor PCB
• Reactor or inductance
• Bridge rectifier
Troubleshooting and repair:
At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the
IPM is defective. Otherwise, please follow the procedure below:
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