Check Point 2 : Check Connection
OK
Check Point 3 : Check the voltage of power supply
Check Point 1-1 : Reset the power
YES
NO
Check Point 1-2 : Check external cause such as noise
N
L
3
2
1
WHITE
BLACK
RED
WHITE
BLACK
+
-
OK
Check Point 4 : Check Serial Signal (Forward Transfer Signal)
Check Serial Signal (Forward Transfer Signal)
>> Check if Indicated value swings between AC70V and AC130V
at Outdoor Unit Terminal 2 - 3.
>> If it is abnormal, Controller PCB is failure. >> Replace Controller PCB.
1. Connection failure 2. External cause 3. Controller PCB failure
Does Error indication reappear?
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 the voltage of power supply.
>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.
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 Indoor Unit Controller PCB
and Filter PCB.
(If there is loose connector or open cable)
02-16
Indoor Unit Controller PCB Circuit
When the outdoor unit cannot receive the serial signal from Indoor unit
more than 10seconds.
Trouble shooting 12
INDOOR UNIT Error Method:
Indicate or Display:
Refer to error code table.
Outdoor Communication Signal Error
(Forward Transfer Signal Error)
AC
AC
Detective Actuators: Detective details:
Forecast of Cause:
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