Fujitsu AOU30RLXEH, Service Instruction

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Trouble shooting 10
INDOOR UNIT Error Method:
Indoor unit communication circuit
(WRC) error
Indicate or Display:
Indoor Unit :
Operation lamp: 3 timesFlash,
Timer lamp : 10times Flash
Error Code : 3 A
Detective Actuators:
Wired remote controller ( 2-Wire )
Indoor unit Controller PCB circuit
Detective details:
When the indoor unit(s) detects the configuration of RCG abnormal or
the indoor unit detects lack of primary -remote controller.
Check Point 2 , 3: Check Indoor unit controller PCB
Forecast of Cause : 1. Terminal connection abnormal 2. Wired remote controller failure
3. Indoor unit controller PCB defective
Check Point 1 : Check the connection of terminal
Indoor unit - Check the connection of terminal between remote control and indoor unit, or between Indoor units and
check if there is a disconnection or short of the cable
Check terminal voltage of controller PCB connector CNC01 (Power supply for remote)
If DC12V, Remote control failure (Controller PCB is OK) >>> Replace Remote controller
If DC0V, Controller PCB failure (Remote is OK) >>> Replace Controller PCB
In case of re-installation is done due to removed connector or incorrect wiring,
turn on the power again.
After turning off the power supply, check & correct the followings
02-13
n: n times blinking : Light ON : Light OFF
Outdoor unit :
POWER
MODE
ERROR
2
5
(L1) (L2) (L6) (L5) (L4) (L3)
15
PUMP
DOWN
LOW
NOISE
PEAK
CUT