Fujitsu AG * V12LAC Series, Service Instruction

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Abnormal current value of IPM is detected.
> Permanent stop.
07
-0
5
CT error
IPM protection
[Diagnosis Point]
Heat radiation is blocked (inlet/outlet).
Check if outdoor fan is defetcive (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 0A.
> permanent stop.
[Diagnosis Point]
Controller PCB defective.
The compressor speed does not synchronze 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")
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.
Compressor location
error
Outdoor fan error
(DC motor)
0.5 sec
2 times
0.5 sec
3 times
0.5 sec
5 times
0.5 sec
6 times
0.5 sec
5 times
17
18
1A
1b
Self - diagnosis function and Checking points
OFF
OFF
OFF
OFF
Error Indication
Operation
(RED)
Timer
(GREEN)
10°C HEAT
(ORANGE)
Error
(Protection)
Diagnosis Method
Wired remote
controller
0.5 sec
2 times
0.5 sec
6 times
Indoor fan lock error
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. (UPPER or LOWER)
Controller PCB defective.
OFF
12