Mitsubishi Electric Mr.SLIM PUHZ-RP6VHA, Техническое и сервисное руководство

Страница: 37 / 82

37
10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA
Phenomena
Factor Countermeasure
1. Remote controller display does not
work.
2. “HO” display is remained on the
remote controller.
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.
1
Normal operation
4. Even controlling by the wireless
remote controller no beep is heared
and the unit does not start operat-
ing. Operation display is indicated
on wireless remote controller.
1
The pair number settings of the wireless remote
controller and indoor controller board are mis-
matched.
1
Check the pair number settings.
5. When operating by the wireless
remote controller, beep sound is
heard, however, unit does not start
operating.
1
No operation for 2 minutes at most after the power
supply ON.
2
Hand-held remote controller operation is prohibited.
• Remote controlling adaptor is connected to CN32
on the indoor controller board.
• Hand-held remote controller operation is prohibited
by centralised controller etc. since it is connected to
MELANS.
3
Factor of No.2 above.
1
Normal operation
2
Normal operation
3
Check the details of No.2 above.
6. Remote controller display works
normally and the unit performs
cooling operation, however, the
capacity cannot be fully obtained.
(The air does not cool well.)
1
Refrigerant shortage
2
Filter clogging
3
Heat exchanger clogging
4
Air duct short cycle
1
• If refrigerant leaks, discharging tempera-
ture rises and LEV opening increases.
Inspect leakage by checking the tem-
perature and opening.
• Check pipe connections for gas leakage.
2
Open suction grill and check the filter.
Clean the filter by removing dirt or dust on
it.
3
• If the filter is clogged, indoor pipe tem-
perature rises and discharging pressure
increases. Check if heat exchanger is
clogged by inspecting discharging pres
sure.
• Clean the heat exchanger.
4
Remove the shield.
1
At longest 2 minutes after the power supply “H0” is
displayed to start up.
2
Communication error between the remote controller
and indoor unit
3
Communication error between the indoor and outdoor
unit
4
Outdoor unit protection device connector is open.
1
DC12V is not supplied to remote controller.
(Power supply display is not indicated on LCD.)
2
DC12~15V is supplied to remote controller, however,
no display is indicated.
• “HO” is not displayed.
• “HO” is displayed.
1
Check LED2 on indoor controller board.
(1) When LED2 is lit.
Check the remote controller wiring for
breaking or contact failure.
(2) When LED2 is blinking.
Check short circuit of remote controller
wiring.
(3) When LED2 is not lit.
Refer to No.3 below.
2
Check the following.
• Failure of remote controller if “HO” is not
displayed
• Refer to No.2 below if “HO” is displayed.
1
Normal operation
2
Self-diagnosis of remote controller
3
“HO” is displayed for 6 minutes at most. in
case of indoor/outdoor unit communica-
tion error. Check LED3 on indoor con-
troller board.
(1)When LED3 is not blinking.
Check indoor/outdoor connecting wire
for mis-wiring.
(Converse wiring of S1 and S2, or
break of S3 wiring.)
(2)When LED3 is blinking.
Indoor/outdoor connecting wire is nor-
mal.
4
Check LED display on outdoor controller
board.
Check protection device connector (63L
and 63H) for contact failure.
OC294--2.qxp 03.6.9 7:37 PM Page 37