Ct Error - Fujitsu ASYA07LBCM Service Manual

Trouble shooting 12
OUTDOOR UNIT Error Method:

CT error

Detective Actuators:
Outdoor Unit Inverter PCB Circuit
(Input current sensor unit)
Forecast of Cause :
1. Defective connection of electric components 2. External cause 3. Inverter 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 Inverter PCB
If Check Point 1, 2 do not improve the symptom, change Inverter PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Input Current Sensor has detected lower than 0A
while Inverter Compressor is operating at higher than 60Hz,
after 1minute upon starting the Compressor.
(Except during the defrost operation)
is loose.
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.
02-15
apparatus in the same circuit.
contact or leak current in the
power supply circuit.