Fujitsu AU G18LVLB Series Service Instruction page 74
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Also See for AU G18LVLB Series:
- Design & technical manual (253 pages) ,
- Service instruction (70 pages) ,
- Service instruction (122 pages)
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Trouble shooting 30
OUTDOOR UNIT Error Method:
Current Sensor Error
Detective Actuators:
Power supply PCB
Transistor PCB
Forecast of Cause :
1. Defective connection of electric components
4. Transistor PCB failure
Check Point 1-1 : Reset Power Supply and operate
Does Error indication show again?
YES
Check Point 2 :
Check connections of Outdoor Unit Electrical Components
Check if
the terminal connection
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 Filter PCB
If Check Point 1, 2 do not improve the symptom, change Power supply PCB .
OK
Check Point 4 : Replace Main PCB
If Check Point 3 do not improve the symptom, change Transistor PCB
Indicate or Display:
Indoor Unit : Operation lamp: 8 time Flash,
Timer lamp: 4 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : 84]
Detective details:
When Input Current Sensor has detected 0A, while Inverter Compressor is
operating at higher than 50rps, after 1minute upon starting the Compressor.
(Except during the defrost operation)
is loose.
2
. External cause
3. Power supply PCB failure
NO
Check Point 1-2 :
Check external cause at Indoor and Outdoor
(Voltage drop or Noise)
Instant drop : Check if there is a large load electric
Momentary power failure : Check if there is a defective
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.
02-35
Outdoor unit :
PUMP
LOW
POWER
DOWN
NOISE
ERROR
(L1)
(L2)
(L3)
MODE
4
2
8
apparatus in the same circuit.
contact or leak current in the
power supply circuit.
PEAK
CUT
(L4)
(L5)
(L6)
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Troubleshooting
