Midea MCH2U-18PHH2

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8.4.2.8 P1 (High pressure protection) diagnosis and solution.
Error Code
P1
Malfunction conditions
If the sampling voltage is not 5V, the LED will display the
failure.
Potential causes
● Wiring mistake
● Faulty over load protector
● System block
● Faulty outdoor PCB
Trouble shooting: