MegaLife ARV Series, Service Manual, Page: 138 / 172

MegaLife ARV OUTDOOR UNIT
–
ARV 6 ALL DC INVERTER T1 50&60HZ Service Manual
138
2.2 Pressure sensor failure (2)
Code
Definition Possible reason for error code
F1
【
P
d
】
High pressure sensor failure
1. High pressure sensor failure
2. High pressure sensor connection
is incorrect
3.
Outdoor unit’s main PCB failure
F4
【
P
s
】
Low pressure sensor failure
1. Low pressure sensor failure
2. The connection between sensor
and outdoor PCB incorrect
3.
Outdoor unit’s main PCB failure
2.3 Pressure abnormal (4)
Code
Definition Possible reason for error code
F3
【
P
d
】
High pressure too high
1. Exhaust pipe or condenser pipe block
2. Condenser dirty
3. Outdoor unit fan stop or low speed
4. Refrigerant overcharge
F6
【
P
s
】
Low pressure too low
1. Indoor unit fan stop or low speed
2. Evaporator dirty
3. Indoor EXV full open in cooling mode
(Outdoor EXV full open in heating mode)
4. Lack refrigerant
5. The pipe between evaporator and suction
port block