Fujitsu AS*9LSACW Service Instructions Manual page 54

0.5 sec 0.1 sec. Outdoor Unit
5 times blinking Controller
Error
0.1 0.5 sec Main Relay Error
sec. 3 times
blinki
ng
0.1 0.5 sec Power Supply
sec. 4 times Frequency Detection
blinki Error
ng
0.1 0.5 sec IPM Protection
sec. 2 times
blinki
ng
0.1 0.5 sec CT Error
sec. 3 times
blinki
ng
0.1 0.5 sec Compressor Location
sec. 5 times Error
blinki
ng
0.1 0.5 sec Outdoor Fan
sec. 6 times (DC Motor)
blinki
ng
After 2 minutes 20 seconds of stopping operation, the signal from outdoor unit is received even though the main
relay is OFF.
> Main Relay OFF continues (Outdoor Unit OFF Command)
[Diagnosis Point]
- Main Relay defective
- Controller PCB defective.
The power supply frequency can not be recognized after 4 seconds of power ON.
> Permanent stop.
[Diagnosis Point]
- Controller PCB defective.
Abnormal current value of IPM is detected
[Diagnosis Point]
- Heat radiation is blocked (Inlet/Outlet)
- Check if Outdoor Fan is defective (does not rotate).
- Controller PCB defective (Refer to after mentioned "IPM diagnosis")
- Refrigeration cycle defective (Refer to after mentioned "Refrigeration cycle diagnosis").
The current value during the operation after 1 minute from starting up the compressor is 0 A.
> Permanent stop.
[Diagnosis Point]
- Check if CT wire is open.
- Controller PCB defective.
The compressor speed does not synchronize with the control signal. (Including start up failure of the compressor)
> Permanent stop.
[Diagnosis Point]
- Check if 2 way valve or 3 way valve is left open.
- Check the compressor (Winding resistance value, Loose lead wire).
- Refrigeration cycle defective (Refer to after mentioned "Refrigerant cycle diagnosis").
Error Either the outdoor fan motor abnormal current or location error was detected.
> Permanent stop.
[Diagnosis Point]
- Fan motor connector loose/ defective contact.
- Fan motor defective.
- Controller PCB defective.
> Permanent stop.