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Indoor unit
Green LED
Red LED 3 time flash
Keeps flashing
Outdoor unit
Green LED
Red LED Stays OFF
Keeps flashing
OK
Remote
controller wiring
connect check (Red·
White·Black)
Remote controller wire
is removed
NO
Correction
NO
Approximately
10 ~ 11 V between
X and Z.
YES
Note (1) Z is GND.
Note (2) 3 is GND.
(2)
(1)
Power supply reset
Maltifunction by
accidental noise
YES
Normal?
NO
YES
Remote controller wire short circuit?
Remote controller defective
Remote controller wire
disconnection?
Remote controller defective
NO
Remeasure
between X~Z.
10~11V.
YES
YES
Is the voltage
between CNW8 1-3
12V?
NO
Replacement indoor unit power
supply PCB
Replacement indoor
unit control PCB
NG
Check the
CNW5-8 harness.
OK
Only case of FDT
Harness exchange
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.