Caring For The Machine; Troubleshooting; How To Clean - Mitsubishi Electric CITY MULTI R410A Serie Manual De Operación

4. Caring for the machine

Always have strainer maintenance performed by a service person.
Before care-taking, turn the power supply OFF.
Caution:
• Before you start cleaning, stop operation and turn OFF the power supply.
Remember that the fan is rotating inside at high speed, posing a serious
risk of injury.
• Indoor units are equipped with strainer to remove the dust of sucked-in
air. Clean the strainer using the methods shown in the following sketches.
• The life of the strainer depends on where the unit is installed and how it
is operated.

5. Troubleshooting

Before you ask for repair service, check the following points:
State of Machine Remote Controller
"'" display is not lit up
No display appears even
It does not run.
when the [ON/OFF] but-
ton is pressed.
Water out but it does The liquid crystal display
not cool enough or heat shows that it is in the
enough. state of operation.
Cool water or warm The liquid crystal display
water does not come shows that it is in opera-
out. tion.
The "CHECK" and check
It runs briefly, but soon
code flashes on the liquid
stops.
crystal display.
• 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,
furniture, etc., absorbed in the air conditioner.
• A hissing noise can be heard immediately after the air conditioner is started or stopped. This is the sound of the refrigeration flowing inside the air conditioner. This is
normal.
• 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.

How to clean

•
•
Never pour water or flammable sprays onto the air conditioner. Cleaning using
these methods can result in the failure of the air conditioner, electric shock,
or fire.
Cause
Power failure
The power supply is turned OFF.
The fuse in the power supply is gone.
The earth leakage breaker is gone.
Improper temperature adjustment
The restart-preventing circuit is in operation for 3 min-
utes.
Indoor unit operation was restarted during the heating
and defrosting operation.
There are some obstacles at the air inlet and outlet of
the indoor and outdoor units.
The strainer is filled with dust and dirt.
When washing the strainer, remove the cover and scrub the strainer inside
with brush.
Caution:
Do not dry the strainer by exposing it to direct sunlight or warming it
using fire, etc. Doing so can result in the deformation of the strainer.
Caution:
Press the [ON/OFF] button after power restoration.
Turn the power supply ON.
Replace fuse.
Put in the earth leakage breaker.
After checking the set temperature and inlet temperature
on the liquid crystal display, refer to [Water temperature ad-
justment], and operate the adjustment button.
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.)
Wait for a while.
(Heating operation starts after ending defrosting operation.)
Rerun after removal
Rerun after cleaning the strainer. (Refer to [Caring for the
machine].)
Troubleshooting
17