Midea MHC-V8W/D2N8-B

M thermal Mono
202004 75
4.16 P1 Troubleshooting
Digital display output
Description
 Discharge pipe high pressure protection. When the discharge pressure rises above 4.2MPa, the system displays P1
protection and M thermal Mono stops running. When the discharge pressure falls below 3.2MPa, P1 is removed and
normal operation resumes.
 Error code is displayed on refrigerant system main control board for refrigerant system and user interface.
Possible causes
 Pressure sensor/switch not connected properly or has malfunctioned.
 Excess refrigerant.
 System contains air or nitrogen.
 High pressure side blockage.
 Poor condenser heat exchange.
 Main PCB damaged.
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