Accorroni COLONNA CLN130R, Service Manual

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 Troubleshooting 
TS09-L: IPM malfunction or IGBT over-strong current protection or Inverter compressor
drive error diagnosis and solution
Description: 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.
Or an abnormal inverter compressor drive is detected by a special detection circuit, including communication signal
detection, voltage detection, compressor rotation speed signal detection and so on.
Recommended parts to prepare:
• Connection wires
• IPM module board
• Outdoor fan assembly
• Compressor
• Outdoor PCB
• High-voltage components
• PFC circuit or reactor
Troubleshooting and repair:
First, test the resistance between every two ports of U, V, the W of the IPM and P, N. If any of the results is 0 or
close to 0, the IPM is defective. If not, follow the following procedure:
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