Fujitsu AU G18LVLB Series Service Instruction page 60
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Also See for AU G18LVLB Series:
- Design & technical manual (253 pages) ,
- Service instruction (70 pages) ,
- Design & technical manual (67 pages)
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Trouble shooting 16
INDOOR UNIT Error Method:
Indoor unit power supply error for
fan motor
Detective Actuators:
Indoor Unit Controller PCB
Forecast of Cause :
1. External cause
Check Point 1 : Check external cause at lndoor 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
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.
OK
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.
OK
Check Point 3 : Replace Controller PCB
If Check Point 1, 2 do not improve the symptom, replace Controller PCB.
Indicate or Display:
Indoor Unit : Operation lamp: 3 time Flash,
Timer lamp: 9 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : 39]
Detective details:
When a momentary power cut off.
When do not start fan motor.
2. Connection of connector failure
in the power supply circuit.
3. Controller PCB failure
02-21
Outdoor unit :
PUMP
LOW
POWER
DOWN
NOISE
ERROR
MODE
(L1)
(L2)
(L3)
(L4)
15
2
5
PEAK
CUT
(L5)
(L6)
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Table of Contents
Troubleshooting
