Caring For The Unit; Troubleshooting; Installation, Transferring Works, And Checking - Mitsubishi Electric PFD-P500VM-E Operation Manual

7. Caring for the unit

Always have filter 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 sup-
ply. Remember that the fan is rotating inside at high speed, posing a
serious risk of injury.
• Indoor units are equipped with filters to remove the dust of sucked-in
air. Clean the filters using the methods shown in the following sketch-
es. (The standard filter should normally be cleaned once a week, and
the long-life filter at the beginning of each season.)
• The life of the filter depends on where the unit is installed and how it is
operated.

8. 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.
The liquid crystal display
Air flows out but it does shows that it is in the
not cool enough. state of operation.
The liquid crystal display
Cool air 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 unit failures:
• The air blown out from the unit can sometimes give off odors. This is due to cigarette smoke contained in the air of the room, the smell of cosmetics, the walls, furni-
ture, etc., absorbed in the unit.
• A hissing noise can be heard immediately after the unit is started or stopped. This is the sound of the refrigeration flowing inside the unit. This is normal.
• The unit 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 ex-
pansion and contraction caused by temperature change. This is normal.
• A white mist of steam may be emitted from the indoor unit when operation commences at high indoor temperature or humidity.

9. Installation, transferring works, and checking

Regarding place for installation
Consult with your dealer for details on installation and transferring the installa-
tion.
Caution:
Never install the unit where there is a risk of leakage of flammable gas.
If gas leaks and accumulates around the unit, fire can result.
Never install the unit 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 units at hospitals
or communication-related businesses.
10
How to clean
• Clear dust away lightly or clean it up with a vacuum cleaner. In the case
•
•
Never pour water or flammable sprays onto the unit. Cleaning using these
methods can result in the failure of the unit, 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 filter is filled with dust and dirt.
There are some obstacles at the air inlet and outlet
of the indoor and outdoor units.
Windows and doors are open.
The restart-preventing circuit is in operation for
20-seconds.
There are some obstacles at the air inlet and outlet
of the indoor and outdoor units.
The filter is filled with dust and dirt.
If the unit is used in any of the above-mentioned environments, frequent opera-
tional failure can be expected. It is advisable to avoid these types of installation
sites.
For further details, consult with your dealer.
Regarding electrical work
•
•
•
Regarding transfer of installation
• When removing and reinstalling the unit when you enlarge your home, re-
of severe staining, wash the filter in lukewarm water mixed with dissolved
neutral detergent or water, and then rinse off the detergent completely. After
washing, dry it and fix it back into place.
Caution:
Do not dry the filter by exposing it to direct sunlight or warming it using
fire, etc. Doing so can result in the deformation of the filter.
Washing it in hot water (more than 50 °C) can also result in deforma-
tion.
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 [Room temperature
adjustment], and operate the adjustment button.
Clean up the filter.
(Refer to [Caring for the machine].)
Remove.
Close.
Wait for a while.
(To protect the compressor, a 20-seconds restart-pre-
venting circuit is built into the indoor unit. Therefore, there
are occasions sometimes when the compressor does not
start running immediately. There are cases when it does
not run for as long as 20-seconds.)
Rerun after removal
Rerun after cleaning the filter. (Refer to [Caring for the
machine].)
Caution:
The electrical work must be undertaken by a person who is qualified
as an electrical engineer according to the [technical standard respect-
ing electrical installation], [internal wiring rules], and the installation
instruction manual 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 gas pipe, 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.
model, or move, consult with your dealer in advance to ascertain the cost of
the professional engineering work required for transferring the installation.
Troubleshooting