Panasonic WH-SXC09H3E8

211
16.5.47 Cooling High Pressure Overload Protection (F95)
Malfunction Decision Conditions:
During operation of cooling, when pressure 4.0 MPa and above is detected by outdoor high pressure sensor.
Malfunction Caused:
1 Dust accumulation in the outdoor unit heat exchanger.
2 Air short circuit at outdoor unit.
3 2 way valve closed.
4 Faulty outdoor unit fan motor.
5 Clogged expansion valve or strainer.
6 Excessive refrigerant.
7 Faulty outdoor high pressure sensor.
8 Faulty outdoor unit PCB (main).
Troubleshooting:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
- Replace the outdoor unit
PCB (main)
- Replace the outdoor high
pressure sensor
Check refrigerant amount.
Is the additional refrigerant
amount filled correctly?
Reclaim and recharge with
correct amount of
refrigerant.
No
Yes
Check for clogged
expansion valve or strainer.
Is the expansion valve or
strainer clogged (ice formed)?
- Replace the expansion
valve and/or strainer
- Reclaim and recharge
refrigerant
Yes
No
Check the dust accumulation on the
outdoor unit heat exchanger.
Is the outdoor unit heat
exchanger dirty?
Check the outdoor air
passage.
Provide sufficient air
passage.
Yes
Is there any short circuit?
No
Clean the heat exchanger.
Yes
No
Is the 2 way valve closed?
Open the 2 way valve.
Check the 2 way valve.
Yes
Is the outdoor unit fan
motor operate normally?
Check the outdoor unit fan
motor operation.
Replace the outdoor unit
fan motor and/or outdoor
unit PCB (main).
Yes
No
No