Carrier 38QHC009D8S Series, Service Manual

Page: 46 / 55

44
10.2.6 Overload current protection diagnosis and solution(F0)
Error Code
F0
Malfunction decision
conditions
An abnormal current rise is detected by checking the specified
current detection circuit.
Supposed causes
●
Power supply problems.
●
System blockage
●
PCB faulty
●
Wiring mistake
●
Compressor malfunction
Check the power supply
Check the connections and
wires
Stop the unit
No
Yes
No
Correct the connections or
replace the wires.
Yes
Replace the outdoor unit
Yes
Check the reactor
No
Replace outdoor main PCB
Check the blockage of system
Yes
No Clear the blockage
Check the compressor
resistance values
Yes
No Replace the compressor