Fujitsu Inverter Halcyon ASU12RMLQ, Service Instruction

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Trouble shooting 15
OUTDOOR UNIT Error Method:
Detective Actuators: Detective details:
Forecast of Cause :
Check Point 3 : Check Filter PCB and Main PCB
YES
NO
OK
Indicate or Display:
Refer to error code table.
CT error
Outdoor Unit Main PCB Circuit
Outdoor Unit Filter PCB Circuit
(Input current sensor unit)
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. Filter PCB failure 4. 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 lower than 0A
while Inverter Compressor is operating at higher than 50Hz,
after 1minute upon starting the Compressor.
(Except during the defrost operation)
02-22
Check DC voltage of CN1 (between 2 (Brown) and 3 (Red)) on Filter PCB.
>> After 40seconds upon starting the Compressor,
If it is higher than 0.2V, Main PCB is failure. (Filter PCB is normal) >> Replace Main PCB
>> If it is lower than 0.2V, Filter PCB is failure. >> Replace Filter PCB
If it does not improve the symptom, change Main PCB.