Trouble Shooting With Error Code - Fujitsu ARU9RLF Service Instruction

Slim duct type inverter
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2-2 TROUBLE SHOOTING WITH ERROR CODE

Trouble shooting 1-1
OUTDOOR UNIT Error Method:
Serial communication error
(Serial Reverse Transfer Error)
Detective Actuators:
Outdoor unit Main PCB
Outdoor unit fan motor
Forecast of Cause:
1. Connection failure
5. Transistor PCB (IPM) failure 6. Filter PCB failure 7. Outdoor unit Fan motor failure
Check Point 1-1 : Reset the power and operate
Does Error indication show again?
YES
YES
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.
OK
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>> Check if AC187V (AC208V -10%) - 253V (AC230V +10%) appears
at Outdoor Unit Terminal L - N.
OK
Check Point 4 : Check Serial Signal (Reverse Transfer Signal)
Check serial signal (Reverse transfer signal)
>> Check if indicated value swings between AC90V and AC270V at outdoor unit terminal 1 - 3.
>> If it is abnormal, Check the parts as follows.
- Outdoor unit fan motor
- Active filter module
- Transistor PCB (IPM)
- Filter PCB
>> If Outdoor fan motor is abnormal, replace Outdoor unit fan motor and Main PCB.
>> If Active filter module or IPM is abnormal, replace it.
>> If the parts are normal, replace Main PCB.
GREEN
WHITE
N
BLACK
L
RED
3
WHITE
2
BLACK
1
Indicate or Display:
Refer to error code table.
Detective details:
When the indoor unit cannot receive the serial signal from Outdoor unit
more than 2minutes after power ON, or the indoor unit cannot receive
the serial signal more than 15seconds during normal operation.
2. External cause
3. Main PCB failure
(PARTS INFORMATION 5)
(PARTS INFORMATION 6) *For AOU18RLFC
(PARTS INFORMATION 7) *For AOU18RLFC
(Check the wire of CN110) *For AOU18RLFC
+
-
4. Active filter module failure
NO
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).
02-03

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