Fujitsu ASYA07LGC Service Instruction page 49

Self - diagnosis function and Checking points
Error Indication
Error
Operation Timer
(Protection)
(GREEN) (ORANGE)
0.5 sec 0.5 sec Discharge temperature
7 times 2 times error
0.5 sec Excessive high pressure
3 times protection on cooling
Active Filter Error
0.5 sec 0.5 sec
8 times 2 times (Permanent Stop)
0.5 sec Active Filter Error
3 times
0.5 sec PFC circuit error
4 times
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").
Output voltage error of Active filter is detected.
> Permanent stop.
[Diagnosis Point]
Check the wiring connection (Connector is loose/open, Choke coil)
Controller PCB defective (Refer to after mentioned "Active Filter diagnosis")
Active filter error or instantaneous cut off error is detected.
> Compressor, Outdoor Fan : OFF
[Diagnosis Point]
Check the wiring co nnection (Connector is loose/open, Choke coil)
Controller PCB defective (Refer to after mentioned "Active Filter diagnosis")
<CAUTION> Even if the unit is normal, it may detect error depending on the power supply voltage condition.
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