45
11-5. TROUBLESHOOTING OF PROBLEMS
Phenomena
Factor
Countermeasure
(2) Remaining “PLEASE WAIT” display
on the remote controller
1
Main power is not turned on. (Power supply inferior)
2
Mis-wiring, breaking or contact failure of the connect-
ing line
Reference (Meaning of the indoor control board LED)
LED1 : Microprocessor power supply
....Display of DC14V is supply or not from indoor power.
LED2 : Power output supplied to remote controller
....Displays the power condition supplied to wired remote controller. When the
refrigerant address is “0” supplied power output ON.
LED3 : Indoor outdoor communication monitor
....Blinking, when receiving the signal normally from the outdoor unit.
1
Check the power wiring to the outdoor
unit and the breaker.
2
Check for incorrect wiring, wiring breaks
and poor connections between the indoor
and outdoor units.
1
Refrigerant address excepts “0”
2
Mis-wiring, breaking or contact failure of the connect-
ing line
1
Set the refrigerant address to "0" (only 1
refrigerant can be "0" for group control).
2
Check for incorrect wiring, wiring breaks
and poor connections between the indoor
and outdoor units.
1
Short circuit, miswiring and breaking
1
At longest 2 minutes after the power supply “PLEASE
WAIT” is displayed to start up.
1
Check for shorts, incorrect wiring and wir-
ing breaks in the remote controller wires.
2
Replace the remote controller if the volt-
age to the remote controller terminal
block (TB6) is between 10 and 16V DC.
Normal operation
(3) When pressing the remote controller
operation switch the OPERATION
display is appeared but it will be
turned off soon.
1
After cancelling to select function from the remote
controller, the remote controller operation switch will
be not accepted for approx. 30 seconds.
Normal operation
(4) Even controlling by the wireless
remote controller no beep and not
working (Display is available on the
wireless remote controller.)
1
The pair number settings of the wireless remote
controller and indoor control PCB are mismatched
2
Disconnecting of wireless receiving board and
contact failure
3
Factor of the above (1)
1
Check the pair number settings.
2
Check the indoor controller board
connector (CN90).
Check the wireless receiving board
connector (CNB).
3
Check the details of above (1).
(5) When operating by the wireless
remote controller, beep sound is
heard without working.
1
No operation for max. 2 minutes after the power sup-
ply ON
2
Remote operation is prohibited.
• Remote controlling adaptor is connected to the
indoor controller board (CN32).
• Remote operation is prohibited by centralised con-
troller etc. since it is connected to MELANS.
3
Factor of the above (2)
1
Normal operation
2
Normal operation
3
Check the details of above (2).
1
Communication fault between the remote controller
and indoor
2
Communication fault between the indoor and outdoor
3
Outdoor unit protection device is opened.
(Abnormal code will be displayed after 2~6 minutes.)
Turn the power supply OFF/ON, and check
the following:
1
If an error is displayed on the remote
controller or outdoor unit's LED within 6
minutes: Refer to the self-diagnosis table
to take appropriate action.
2
If "H0" display remains for 6 minutes:
Failure in indoor control PCB or remote
controller
LED1
off
off
off
Lighting
off
off
(or blinking)
Lighting
Blinking
(or lighting)
–
LED2
LED3
Indoor control P.C. board LED
1
2
3
(1) Remote controller display does not
work.
(Electric current marker “ ” is not
displayed on the remote controller.)
OC379F
