Mitsubishi Electric Mr.SLIM PUHZ-RP1.6VHA, Руководство по техническому обслуживанию

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96
12-2. Trouble shooting by inferior phenomena
Phenomena Factor Countermeasure
(1)Remote controller display does not
work.
(Electric current marker “ ” is not
displayed on the remote controller.)
(2)Remaining “H0” display on the
remote controller.
1
Main power is not turned on. (Power supply inferior)
2
Mis-wiring, breaking or contact failure of the
connecting line.
Reference (Meaning of the indoor control board LED)
LED1 : Micro computer power supply
....Display of DC14V is supply or not from indoor power.
LED2 : Power output supplied to remote controller
....Display 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.
(Refer to page 99.)
1
Refrigerant address excepts “0”.
2
Mis-wiring, breaking or contact failure of the
connecting 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.
(Refer to page 100.)
1
Short circuit, mis-wiring and breaking
1
At longest 2 minutes after the power supply “H0” is
displayed to start up.
1
Check for shorts, incorrect wiring and wiring breaks in the
remote controller wires.
2
Replace the remote controller if the voltage to the remote
controller terminal block (TB6) is between 10 and 16V DC.
(Refer to page 101.)
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 controller board are mis-
matched.
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 connec-
tor (CN90).
Check the wireless receiving board con-
nector (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 control 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).
(6)Upward/downward vane perfor-
mance fault.
1
When the unit is as follows in the HEAT mode, the
vane is not downward.
(Working of COOL protection function)
•During HEAT preparation.
•During defrosting.
•During compressor stop.
2
When setting the downward vane in the cool/dry
mode, the vane changes to Horizontal position after 1
hour.
3
Vane motor does mot rotate.
A) Vane motor fault.
B) Disconnecting, breaking and contact fault of the
connector.
C) Setting to no vane unit.
1
Normal operation
2
Normal operation
3
A) Vane motor resistance value check.
Refer to “5, HOW TO CHECK THE
PARTS”.
B) Disconnecting, breaking, and contact
fault of the connector.
Stepping motor adopting model
.... CN6V check
AC timing motor adopting model
.... CNV check
C) Check the setting details by selecting
the remote controller function.
Setting check of the indoor control
board J11~J15 (SW1).
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 on page 106 to take
appropriate action.
2
If "H0" display remains for 6 minutes:
Failure in indoor controller board or remote controller
(Refer to page 98.)
LED1
off off off
Lighting off
off
(or blinking)
Lighting
Blinking
(or lighting)
–
LED2 LED3
Indoor control p.c.board LED
1
2
3
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