Fujitsu AGHG09KVCA, Manual

Page: 197 / 403

2-20. E: 57. Damper (Open/Close) detection limit switch error
Indicator Indoor unit
Operation indicator 5 time flash
Timer indicator 7 time flash
Economy indicator Continuous flash
Error code E: 57
Detective actuator
Indoor unit main PCB • When limit switch were not able to detect the close
though the damper close.(Upper air flow)
• When limit switch were not able to detect the open
though the damper open.(Upper & Lower air flow)
Limit switch
Damper
Forecast of cause
Limit switch failure
Shorted connector/wire
Damper faulure
Controller PCB failure
Check point 1. Check limit switch
• Check operation of limit switch. (any blocking by dust, etc.)
• Remove limit switch and check ON/OFF switching operation by using a meter.
-> If limit switch is detective, replace it.
↓
Check point 2. Check connector (CN18)/wire
Check loose contact of CN18/shorted wire (pinched wire).
-> Replace limit switch if the wire is abnormal
↓
Check point 3. Check Damper
• Check the obstruction of damper movement.
• Check the damper movement.
-> Replace damper if the damper is abnormal
↓
Check point 4. Replace the main PCB
If Check Point 1 and 3 do not improve the symptom, replace the main PCB.
↓
End
2-20. E: 57. Damper (Open/Close) detection limit switch error
- (03-33) -
2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING