Fujitsu ASYA24LCC - Page 52

0.5
sec.
4 times
0.5 sec
3 times
Main Relay ErrorNo Display
No Display
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.
0.5 sec
4 times
The power supply frequency can not be recognized after 4 seconds of power ON.
> Permanent stop.
[Diagnosis Point]
- Controller PCB defective.
0.5
sec.
5 times
0.5 sec
2 times
IPM Protection
Abnormal current value of IPM is detected > Permanent stop.
[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”).
0.5 sec
3 times
CT Error
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.
0.5 sec
5 times
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”).
Outdoor Unit
Controller
Error
0.5 sec
6 times
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.
07-05
Indoor unit
Controller
Error
0.5 sec
2 times
Forced Auto Switch
Error
Forced Auto Switch becomes ON for 10 consecutive seconds.
> It indicates the error but the operation continues.
[Diagnosis Point]
- Check if forced Auto Switch is kept pressed.
- Forced Auto Switch defective.
- Controller PCB defective.
Power Supply Frequency
Detection Error
Compressor Location
Error
Outdoor Fan Error
(DC Fan Error)
20
17
18
1A
1b