Fujitsu AOU30RLXEH, Service Instruction

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Trouble shooting 4
INDOOR UNIT Error Method:
External communication error
02-07
Detective Actuators: Detective details:
Forecast of Cause :
OK OK
External communication error
Check any loose or removed connection of between the controller PCB to the external I/OPCB
>>If there is an abnormal condition, correct it by refer to installation manual or
the technical manual.
Check the connection condtion on the external I/O PCB and the controller PCB
(If there is loose connector, open cable or mis-wiring)
the same a signal has not been received for 15sec
After receiving a signal from the external I/O PCB,
1. Connection failure 2.External I/O PCB failure 3.Controller PCB failure
Check Point 1 : Check the connection
Indicate or Display:
Indoor Unit :
Operation lamp: 1 times Flash,
Timer lamp : 8 times Flash
ERROR CODE : [E : 18]
Check Point 2: Replace external I/O PCB
If Check Point 1 do not improve the symptom, change External I/O PCB.
OK OK
Check Point 3: Replace Controller PCB
If Check Point 2 do not improve the symptom, change Controller PCB.
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