Fujitsu ASYA07LCC Service Instruction page 56

Self - diagnosis function and Checking points
Error Indication
Error
Operation Timer (Protection)
(RED) (GREEN)
0.5 sec 0.5 sec Indoor fan lock error
6 times 2 times
0.5 sec Indoor fan speed error
3 times
0.5 sec 0.5 sec Discharge temperature
7 times 2 times error
0.5 sec Excessive high pressure
3 times protection on cooling
0.5 sec 0.5 sec PFC circuit error
8 times 4 times
The indoor fan speed is 0 rpm after 56 seconds from starting operation or from the time the fan mode was changed.
> Operation stop. (It releases by sending the operation stop signal from the remote controller).
[Diagnosis Point]
Fan motor connector loose /defective contact.
Fan motor defective
Controller PCB defective.
The indoor fan speed is 1/3 of the target frequency after 56 seconds from starting operation or from the time the fan mode was
changed. > Operation stop. (It releases by sending the operation stop signal from the remote controller).
[Diagnosis Point]
Fan motor connector loose /defective contact.
Fan motor defective
Controller PCB defective.
The discharge temperature error is activated.
> Permanent stop.
[Diagnosis Point]
Check if 2-way valve or 3-way valve is left open.
Heat radiation is blocked (Inlet /outlet).
Check if outdoor fan is defective (does not rotate).
Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle disagnosis").
Excessive high pressure protection on cooling mode has been activated.
> Compressor, outdoor fan : Off (It releases after 3 minute ST).
[Diagnosis Point]
Heat radiation is blocked (Inlet /outlet).
Check if outdoor fan is defective (does not rotate).
Refrigeration cycle defective (Refer to after mentioned "refrigerant cycle disagnosis").
Excessive voltage of DC voltage on PFC circuit in inverter PCB is detected, or the excessive current in the circuit is detected.
> Permanent stop.
[Diagnosis Point]
Controller PCB defective (Refer to after mentioned "PFC circuit diagnosis")
Diagnosis Method