Fujitsu B24LDC, Service Instruction

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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
-0
6
Compressor Location
Error
Outdoor Fan Error
(DC Fan Error)
17
18
1A
1b