Airwell WELLEA MONOBLOC AW-WHPM05-H91, Service Manual

Page: 70 / 104

Wellea Monobloc
69
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
Wellea
Mono stops running. When the pressure rises above 0.30MPa, P0 is
removed and normal operation resumes.

HP indicates P0 protection has occurred 3 times in 60 minutes. When an HP error occurs, a manual system restart
is
required before the system can resume operation.

Error code is displayed on refrigerant system 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.

Main PCB damaged.