Specifications

259
Indoor unit
Red LED
Green LED
*3 times flash
Keeps flashing
Stays OFF
Keeps flashing
Red LED
Green LED
Outdoor unit
* Lamp OFF if remote controller wire is broken at power ON.
Indoor unit
Red LED
Green LED
Stays OFF or Lights
continuously
Stays OFF or Lights
continuously
Stays OFF
Keeps flashing
Red LED
Green LED
Outdoor unit
Is DC 10.8V de-
tected between
remote controller
terminals (X)
(red) ~ (Z)(black)?
Is DC10.8V detected
between indoor PCB
connectors (CNK)
(red) ~ (black)?
Is voltage swing-
ing at DC6 ~ 10V
between remote
controller termi-
nals (Y) (white)
~ (Z)(black)?
Is voltage swinging
at DC6 ~ 10V between
indoor PCB connestors (CNK)
(white) ~
(black)?
Power sup-
ply reset
Is it
normalized?
(Interference by temporary
noise on remote controller
cords)
Unit is normal.
• Remote controller normal
voltage (DC)
X ~ Z: 10.5 ~ 10.8V
Y ~ Z: 5 ~ 10.8V
YES
YES
YES YES
YES
NO
NO
NO
Defective indoor unit
PCB
NO NO
Broken or poor connec-
tion of remote controller
cord (red) or (black)
Broken or poor connec-
tion of remote controller
cord (white) or (black)
Defective remote controller PCB
Replace.
…
Defective indoor
unit PCB Replace.
If it is normalized by replacing the PCB, it should be judged the remote
controller or indoor unit PCB is defective (defective remote controller
communication circuit).
Defective remote con-
troller PCB
Note (1)
Power supply reset
Is it normalized?
(Runaway of indoor unit
CPU due to noise, etc.
Transient trouble)
Unit is normal.
YES
NO
Defective indoor unit PCB
Replace. (Defective CPU)