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154
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(d) How to advance checks for each faulty symptom
(i) Inspection method when there is no error display
1) Louver motor does not operate
䊳
Inspect at the indoor unit side.
3) Four way valve does not switch during heating operation
Does the
louver operate at
power on?
Is LM wire
broken?
Is LM
locked?
NONO
YESYES
NO
YES
NO
YES
Defective indoor
unit PCB
Is the louver
operated with the remote
controller
Operate more than
1 min. later
Replace LM
Note (1) LM: Louver motor
Repair the wire
Normal
Defective indoor unit PCB
Replacement
Is the voltage
betweenterminals
1 and 2 of connector
CNS (CNN1)
AC220V?
YES
NO
Defective 20S
Replacement
Defective outdoor unit PCB
Replacement
Note (1) Items is ( ) shown in the case of models FDCA801, 1001.
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