Fujitsu Inverter Halcyon AOU12RL, Service Instruction

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Trouble shooting 13
OUTDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 4 : Replace Main PCB
YES
NO
OK
Indicate or Display:
CT error
Outdoor Unit Main PCB Circuit
Check Point 2 :
Check connections of Outdoor Unit Electrical Components
Check if connector is removed.
Check if
the terminal connection
is loose.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or mis-wiring,
reset the power.
Check Point 1-2 :
Check external cause at Indoor and Outdoor
(Voltage drop or Noise)
1. Defective connection of electric components 2. External cause 3. Main PCB failure
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.
Check Point 1-1 : Reset Power Supply and operate
Does Error indication show again?
When Input Current Sensor has detected 0A, while Inverter Compressor is
operating at higher than 56Hz,after 1minute upon starting the Compressor.
(Except during the defrost operation)
06-17
If Check Point 1, 2 do not improve the symptom, change Main PCB.
Outdoor Unit : LED 2sec ON/ 2sec OFF
Indoor Unit : Operation LED : 5 times, Timer LED : 3 times
ERROR CODE : [E : 18]