02-35
Check Point 4 : Replace Controller PCB
If Check Point 1 3 do not improve the symptom, change Controller PCB.
Trouble shooting 26
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Power supply frequency
detection error
Indoor Unit Controller PCB Circuit
The power supply frequency cannot be recognized after 4sec of power ON.
OK
YES
YES
NO
OK
Check Point 1-1 : Reset the power and operate
Does Error indication show again?
Check Point 1-2:
Check external cause such as noise
Check the complete insulation of the grounding.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
Check Point 2 : Check Connection
Check any loose or removed connection line of
Indoor unit and Outdoor unit.
>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.
Check connection between Outdoor Unit Main PCB
and Filter PCB.
(If there is loose connector or open cable)
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.
1. Connection failure 2. External cause 3. Controller PCB failure
Refer to error code table.
