Midea MCH2U-18PHH2 Service Manual page 83

8.4.2.10 P3 (Current overload protection) diagnosis and solution.
Error Code
Malfunction conditions
Potential causes
Trouble shooting:
P3
If the outdoor current exceeds the current limit value, the LED
will display the failure.
● Wiring mistake
● Faulty over load protector
● System block
● Faulty outdoor PCB
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