Fujitsu AB*30LBAG series, Service Instruction

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Trouble shooting 15
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Outdoor Unit : No indication
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 3 : Check Active Filter Module
OK OK
OK OK
OK OK
Active Filter Module (AFM) error
Outdoor Unit Main PCB Circuit
Active Filter Module
1. External cause 2. Connector connection failure 3. Active Filter Module failure
４
. Main PCB failure
Check Point 2 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Active Filter Module. (PARTS INFORMATION 3)
>>If Active Filter Module is abnormal, replace it.
Check Point 4 : Replace Main PCB
If Check Point 1, 2 do not improve the symptom, change Main PCB.
Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)
Instant drop : Check if there is a large load electric apparatus in the same circuit.
Momentary power failure : Check if there is a defective contact or leak current
in the power supply circuit.
Noise : Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
07-16
When inverter input DC voltage is higher than 467V or
lower than 237V.
When a momentary power cut off occurred on low voltage.
Indoor Unit : Operation LED: Blink, Timer LED: 12 times blink,
Vertical swing LED: OFF