Fisher FSI-95HFD Service Manual page 36

Does compressor operate?
Is refrigerant circulation volume normal?
Gas charging
Is abnormality the same after gas charging
Check refrigerant system (such as clogging of
ill
13.1.10
Display
P3
This is optional, factory standard unit has not this function.
Unit stops when outdoor temp. is low than -15°C and lasting time more than 60 minutes, and unit
runs again when outdoor temp. more than -12°C.
Is the outdoor temp. low than -15°C?
No
Is the outdoor temp sensor right according to the table in clause 12
Replace the outdoor main board
13.1.11
Display
P4
Are the U,V,W connected to compressor and inverter module right?
And is the compressor feed back wires(CN514）connected to PCB good.？
32
Yes
No
No
t )
Outdoor low temp. protection
Yes
Service manual
No
Is the connection good?
Yes
Is protector normal?
Yes
Check the outdoor main PCB
Replace the outdoor main PCB.
LED STATUS
LED STATUS
Inverter compressor error
No
Connect and test again.
No
Replace protector
No