Allied 4DHV Mini-Split Series - Error Codes and Troubleshooting; Error Codes P0 Diagnosis

508067-01 Issue 2016 Page 69 of 75
Error Codes: P0
Description: IPM malfunction or IGBT Over-Current Protection Diagnosis and Solution)
General Note: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows
“P0” and the AC turn o󰀨.
NO
YES
NO
YES
NO
YES
Replace the outdoor PCB.
Is it in working order?
NO
Replace the IPM board or
replace the outdoor PCB.
Check the IPM.
Check the wiring between
PCB and compressor.
Does an error exist?
YES
Ensure proper connecons or
replace the wires and connectors.
Is it in working order?
Check the outdoor fan and the
outdoor unit venlaon.
Please refer to the soluon of the Ā Fan
Speed is Out of Control
ā malfuncon.
Are they within
acceptable parameters?
Check the compressor
resistance values.
Replace the compressor.