Fujitsu AB Series A18LATN, Service Instruction

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Trouble shooting 12
INDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause:
Check Point 2 : Check Connection
OK
Indicate or Display:
Indicate or Display:
ERROR CODE : E : 13
Check Point 3 : Check the voltage of power supply
Check Point 1-1 : Reset the power
YES YES
NO
Check Point 1-2:
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)
Outdoor Communication Signal Error
(Forward Transfer Signal Error)
Indoor Unit Controller PCB Circuit
1. Connection failure 2. External cause 3. Controller PCB failure
Does Error indication reappear?
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 the voltage of power supply
>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.
>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 2 - 3.
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)
>> If it is abnormal, Controller PCB is failure. >> Replace Controller PCB
07-14
When the outdoor unit cannot receive the serial signal from Indoor unit
more than 10seconds.
Outdoor Unit (AB*A18L/ 24L) : No indication
(AB*A36L/ 45L) : LED 4 times blink