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137
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3
Error display :
e1
[Communication error between remote controller~Indoor unit]
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Stays OFF
Keeps flashing
Red LED
Green LED
Outdoor unit
Voltage
between X and Z
approximately
10~11 V?
YES
NO
Replacement remote
controller
Voltage
fluctuates between
5~11 V between
Y and Z.
Is the
resistance between
Y~Z on the remote controller
approximately
10kΩ?
NO
YES
YES
YES
YES
Voltage
fluctuates between
5~10 V between
Y and Z
indoors.
NO
Remote controller
wire disconnection
Voltage
fluctuates between
5~10 V between
CNB Y and Z.
❇
After the green LED lights up once,
it begins flashing again continuously.
The louver moves once in the
close direction.
NO
Terminal block CNB
harness is defective.
Indoor unit
resets every
4 minutes.
Resistance is
approximately 10kΩ
between indoor
Y~Z.
NO
YES
Noise
Replacement indoor
unit control PCB
Power supply reset
Normal?
Normal?
NO
NO
Replacement
remote controller
NO
YES
Replacement indoor
unit control PCB
Remote controller
wire short circuit
YES
NO
Replacement remote
controller
Noise?Power supply reset
Power supply OFF
Remote controller
wire is removed
YES
❇
Indoor unit
Red LED
Green LED
Stays OFF
Stays OFF or Lights
continuously
Stays OFF
Keeps flashing
Red LED
Green LED
Outdoor unit
YES
NO
YES
YES
NO
NO
NO
YES
Power supply
reset
Check the CNW5-
CNW8 harness.
Replacement indoor
unit control PCB
Is it normalized?
Disconnection ?
Replacement indoor unit
power supply PCB
Harness
exchange
Transformer
exchange
Is the
voltage at the transfomer's
secondary side (red-red) 15V
or higher?
(Runaway of indoor
unit CPU due to
noise, etc.
Transient trouble)
Unit is normal.
YES
NO
Defective indoor unit control PCB
Replace. (Defective CPU)
Is the voltage
between CNW8
2-3 12V?
Normal
The unit is normal.
(The malfunction is due to noise, etc.)
Power supply reset
Lighting
Stays OFF
● Only case of FDT
● Cases of other than FDT
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