6
GB
6. Troubleshooting
Before you ask for repair service, check the following points:
• If operation stops due to a power failure, the [restart-preventing circuit at power failure] operates and disables unit operation even after power restoration. In this case, press
the [ON/OFF] button again and start operation.
If malfunctions persist after you have checked the above, turn the power supply OFF and contact your dealer with information about the product name, the nature of the
malfunction, etc. If the display of “[CHECK]” and (4 digit) check code flashes, tell the dealer contents of the display (check code). Never attempt to repair by yourself.
The following symptoms are not air conditioner failures:
• The air blown out from the air conditioner can sometimes give off odors. This is due to cigarette smoke contained in the air of the room, the smell of cosmetics, the walls, fur-
niture, etc., absorbed in the air conditioner.
• The air conditioner sometimes snaps or clicks at the beginning or end of cooling/heating operation. This is the sound of friction on the front panel and other sections due to
expansion and contraction caused by temperature change. This is normal.
• The fan speed changes in spite of not changing the setting. Not to blow out cold air at the beginning of heating operation, the air conditioner automatically adjusts the fan
speed gradually from lower to the set speed. It also adjust its fan speed to protect the fan motor when return air temperature or fan speed excessively rises.
7. Installation, transferring works, and checking
Regarding place for installation
Consult with your dealer for details on installation and transferring the installation.
Caution:
Never install the air conditioner where there is a risk of leakage of flammable
gas.
If gas leaks and accumulates around the unit, fire can result.
Never install the air conditioner at the following place:
• where there is a lot of machine oil
• near the ocean and beach areas where there is salt air.
• where humidity is high
• where there are hot springs nearby
• where there is sulphurous gas
• where there is a high-frequency processing machinery (a high-frequency welder,
etc.)
• where acid solution is frequently used
• where special sprays are frequently used
• Install the indoor unit horizontally. Otherwise, water leakage can result.
• Take sufficient measures against noise when installing the air conditioners at hos-
pitals or communication-related businesses.
If the air conditioner is used in any of the above-mentioned environments, frequent
operational failure can be expected. It is advisable to avoid these types of installation
sites.
For further details, consult with your dealer.
Regarding electrical work
Caution:
• The electrical work must be undertaken by a person who is qualified as an
electrical engineer according to the [technical standard respecting electri-
cal installation], [internal wiring rules], and the installation instruction man-
ual with the absolute use of exclusive circuits. The use of other products
with the power source can result in burnt-out beakers and fuses.
• Never connect the grounding wire to a water pipe, arrester, or telephone
grounding wire. For details, consult with your dealer.
• In some types of installation sites, the installation of an earth leakage
breaker is mandatory. For details, consult with your dealer.
Regarding transfer of installation
• When removing and reinstalling the air conditioner when you enlarge your home,
remodel, or move, consult with your dealer in advance to ascertain the cost of the
professional engineering work required for transferring the installation.
Caution:
When moving or reinstalling the air conditioner, consult with your dealer. De-
fective installation can result in electric shock, fire, etc.
State of Machine
Remote Controller
Cause
Troubleshooting
It does not run.
“
” display is not lit up.
No display appears even
when the [ON/OFF] but-
ton is pressed.
Power failure
Press the [ON/OFF] button after power restoration.
The power supply is turned OFF.
Turn the power supply ON.
The fuse in the power supply is gone.
Replace fuse.
The earth leakage breaker is gone.
Put in the earth leakage breaker.
Air flows out but it does
not cool enough or
heat enough.
The liquid crystal display
shows that it is in the
state of operation.
Improper temperature adjustment
After checking the set temperature and inlet temperature
on the liquid crystal display, operate the adjustment button.
The filter is filled with dust and dirt.
Clean up the filter.
(Refer to [Caring for the machine].)
There are some obstacles at the air inlet and outlet of the
indoor and outdoor units.
Remove.
Windows and doors are open.
Close.
Cool air or warm air
does not come out.
The liquid crystal display
shows that it is in opera-
tion.
The restart-preventing circuit is in operation for 3 minutes.
Wait for a while.
(To protect the compressor, a 3-minute restart-preventing
circuit is built into the indoor unit. Therefore, there are occa-
sions sometimes when the compressor does not start run-
ning immediately. There are cases when it does not run for
as long as 3 minutes.)
Indoor unit operation was restarted during the heating and
defrosting operation.
Wait for a while.
(Heating operation starts after ending defrosting operation.)
It runs briefly, but soon
stops.
The “CHECK” and check
code flashes on the liquid
crystal display.
There are some obstacles at the air inlet and outlet of the
indoor and outdoor units.
Rerun after removal
The filter is filled with dust and dirt.
Rerun after cleaning the filter. (Refer to [Caring for the
machine].)
The sound of the
exhaust and rotation of
the motor can still be
heard after stop of run-
ning.
All lights are out except
the powered display of
“
”.
When other indoor units are engaged in cooling operation,
the machine stops after running a drain-up mechanism for
3 minutes when air-cooling operation is stopped.
Wait for 3 minutes.
The sound of the
exhaust and the rota-
tion of the motor can
be heard intermittently
after stop of running.
All lights are out except
the powered display of
“
”.
When other indoor units are engaged in cooling operation,
drained water is brought in. If the drain water is collected,
the drain-up mechanism initiates a draining operation.
It soon stops. (If the noise occurs more than 2-3 times in an
hour, ask for repair service.)
Warm air comes out
intermittently when the
thermostat is OFF or
during fan operation.
The liquid crystal display
shows that it is in the
state of operation.
When other indoor units are engaged in heating opera-
tion, the control valves are opened and closed from time
to time to maintain the stability of the system.
It soon stops. (If the room temperature rises uncomfortably
high in a small room, stop operation.)
WT06411X03.book 6 ページ ２０１３年４月７日 日曜日 午後１１時５３分
