M thermal Mono
202008 57
4.15 P0, HP Troubleshooting
Digital display output
4.15.1
Description
4.15.2
P0 indicates suction pipe low pressure protection. When the suction pressure falls below 0.14MPa, the system
displays P0 protection and M thermal Mono stops running. When the pressure rises above 0.3MPa, P0 is removed
and normal operation resumes.
HP indicates Pe<0.6Mpa occurred 3 times in an hour.
Error code is displayed on outdoor unit main PCB and user interface.
Possible causes
4.15.3
Low pressure switch not connected properly or has malfunctioned.
Insufficient refrigerant.
Low pressure side blockage.
Poor evaporator heat exchange in heating mode or DHW mode.
Insufficient water flow in cooling mode.
Outdoor unit main PCB damaged.
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