Fisher FSAI-SU-92AE2 Service Manual page 44

8.2.6 Overload current protection diagnosis and solution(F0)
Error Code
Malfunction decision
conditions
Supposed causes
Check the power supply
Yes
Check the blockage of system
Yes
Check the compressor
resistance values
Yes
Check the connections and
wires
Yes
Check the reactor
Yes
Replace the outdoor unit
F0
An abnormal current rise is detected by checking the specified
current detection circuit.
Power supply problems.
●
System blockage
●
PCB faulty
●
Wiring mistake
●
Compressor malfunction
●
No
No
No
No
No
Stop the unit
Clear the blockage
Replace the compressor
Correct the connections or
replace the wires.
Replace outdoor main PCB
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