Midea MCH2U-18PHH2 Service Manual page 89

8.4.2.13 P6 (Inverter module (IPM) malfunction) diagnosis and solution.
Error Code
Malfunction conditions
Potential causes
Trouble shooting:
P6
When the voltage signal that IPM send to compressor drive
chip is abnormal, the display LED will show "P6" and AC will
turn off.
● Wiring mistake
● IPM malfunction
● Faulty outdoor fan assembly
● Compressor malfunction
● Faulty outdoor PCB
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