Fujitsu AG * V09LAC Series Service Instruction page 50

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
6 times
3 times
0.5 sec
OFF
2 times
0.5 sec
OFF
3 times
0.5 sec
OFF
4 times
0.5 sec
OFF
5 times
0.5 sec
OFF
5 times
When the OPERATION Indicator Lamp and the 10°C HEAT Indicator Lamp flashes, the operation can be maintained temporary by changing of air outlet selection switch to
closing the damper completely and press the START/ STOP button.
(If the damper does not close automatically, close the damper manually and fix the position by an adhesive tape etc.)
The unit operates almost the same as upper air flow operation, however the indicator lamp flashes continuously if same symptom is detected again.
Error
(Protection)
Indoor UPPER fan
The indoor fan speed is 1/3 of the target frequency after 56 seconds from starting operation or from the time the fan mode was
speed error changed. > Operation stop. (It releases by sending the operation stop signal from the remote controller).
12
[Diagnosis Point]
Indoor LOWER fan
The indoor fan speed is 0 rpm after 56 seconds from starting operation or from the time the fan mode was changed.
lock error
> Operation stop. (It releases by sending the operation stop signal from the remote controller).
12
[Diagnosis Point]
Indoor LOWER fan
The indoor fan speed is 1/3 of the target frequency after 56 seconds from starting operation or from the time the fan mode was
speed error changed. > Operation stop. (It releases by sending the operation stop signal from the remote controller).
12
[Diagnosis Point]
Damper error
When damper opening recovery operation repeats 6 times.
> Operation stop. (It releases by sending the operation stop signal from the remote controller).
2E
UPPER & LOWER
[Diagnosis Point]
air flow
Damper error
When damper closing recovery operation repeats 6 times.
> Operation stop. (It releases by sending the operation stop signal from the remote controller).
2E
UPPER air flow
[Diagnosis Point]
Damper error
When close detecting sw and open detecting sw operates simultaneously.
> Operation stop. (It releases by sending the operation stop signal from the remote controller).
2E
[Diagnosis Point]
Fan motor connector loose /defective contact.
Fan motor defective.
Controller PCB defective.
Fan motor connector loose /defective contact.
Fan motor defective.
Controller PCB defective.
Fan motor connector loose /defective contact.
Fan motor defective.
Controller PCB defective.
Obstruction of damper movement.
Check if the switch wire(CN18) is open.
Obstruction of damper movement.
Check if the switch wire(CN18) is open.
Check if the switch wire(CN18) is short.
Diagnosis Method
,