Fujitsu AOU24RML1 User Manual

Trouble shooting 11
INDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause:
Check Point 2 : Check Connection
OK
Indicate or Display:Indicate or Display:
Refer to error code table.
Check Point 3 : Check the voltage of power supply
Check Point 1-1 : Reset the power
YESYES
NO
Check Point 1-2:
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 Control PCB (AS,AR),
Main PCB, Power PCB (AU) Circuit
1. Connection failure 2. External cause 3. Controll PCB (AS,AR), Main PCB, Power PCB (AU) 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 AC208 - 230V appears at Outdoor Unit Terminal L - N.
>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal N - 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 Control PCB
and Filter PCB.(AR)
(If there is loose connector or open cable)
>> If it is abnormal, Controller PCB is failure. >> Replace Control PCB (AS,AR),
Main PCB , Power PCB (AU)
02-18
When the outdoor unit cannot receive the serial signal from Indoor unit
more than 10seconds.
N
L
3
WHITE
BLACK
RED
+
-
Check connection between Indoor Unit Main PCB
and Power PCB.(AU)
(If there is loose connector or open cable)

Fujitsu AOU24RML1 Specifications

General

Brand	Fujitsu
Model	AOU24RML1
Category	Air Conditioner
Language	English