38 Specifications subject to change without notice. SG-38MPRA-02
P4 (Inverter compressor drive error diagnosis and solution)
Description: If the temperature of IPM module is higher than limited value, the LED displays the failure code.
Recommended parts to prepare:
• Wiring mistake
• PM malfunction
• Outdoor fan assembly faulty
• Compressor malfunction
• Outdoor PCB faulty
Troubleshooting
Check the wiring between the
PCB and compressor.
Is it improperly wired ?
Ensure proper connections or replace
the wires and connectors.
YES
Check the IPM.
NO
Is it functioning
properly?
Replace the IPM board or
replace the outdoor PCB.
NO
Check the outdoor fan and
the outdoor unit ventilation.
YES
Is it functioning
properly?
Please refer to “Fan Speed
Malfunction” solution.
NO
Check the compressor
resistance values.
YES
Are they within
acceptable parameters ?
Replace the compressor.NO
Replace the outdoor PCB.
YES
To Next Page
Loading...
