Fujitsu AG * V09LAC Series Service Instruction page 49

Self - diagnosis function and Checking points
Error Indication
Wired remote
Operation Timer 10°C HEAT
controller
(RED) (GREEN) (ORANGE)
0.5 sec 0.5 sec OFF
5 times 2 times
0.5 sec
OFF
3 times
OFF
0.5 sec
5 times
0.5 sec OFF
6 times
0.5 sec 0.5 sec
OFF
6 times 2 times
Error
(Protection)
IPM protection
Abnormal current value of IPM is detected.
> Permanent stop.
17 [Diagnosis Point]
CT error
The current value during the operation after 1 minute from starting up the compressor is 0A.
> permanent stop.
[Diagnosis Point]
18
Compressor location The compressor speed does not synchronze with the control signal. (Including start up failure of the compressor).
> permanent stop.
error
[Diagnosis Point]
1A
Outdoor fan error Either the outdoor fan motor abnormal current or location error was detected.
> Permanent stop.
(DC motor)
1b [Diagnosis Point]
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).
12
[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").
Controller PCB defective.
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")
Fan motor connector loose/ defective contact.
Fan motor defective.
Controller PCB defective.
Fan motor connector loose /defective contact.
Fan motor defective. (UPPER or LOWER)
Controller PCB defective.
Diagnosis Method