The Smart Way To Use; Caring For The Unit; Troubleshooting - Mitsubishi Electric PFAV-P250VM-E Manuel D'utilisation

4. The Smart Way to Use

Even minimal steps to care for your unit can help make its use far more
effective in terms of air-conditioning effect, electricity charges, etc.
Clean the filter thoroughly
• If the screen of the air filter becomes clogged, the airflow and air-conditioning
effect can be significantly reduced.
Further, if the condition is left unattended, failure can result. It is particularly
important to clean the filter at the beginning of the cooling and heating seasons.
(When profuse dust and dirt have accumulated, clean the filter thoroughly.)

5. Caring for the Unit

Always have filter maintenance performed by an authorized 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 filters to remove the dust of sucked-in air.
The standard filter should normally be cleaned once a week.
• The life of the filter depends on where the unit is installed and how it is
operated.

6. Troubleshooting

Before you call out a repair man, check the following table to see whether there is
a simple solution to your problem.
Unit does not cool very well.
• Clean the filter. (Dust and debris that collects in the filter will decrease
airflow.)
• Check the temperature setting and adjust it if necessary.
• Increase the space surrounding the unit.
Is the air intake or air outlet blocked?
• Is a window or door open?
There is a "swishing" noise that occurs from the unit when water flows.
• This sound is made when refrigerant inside of the unit is flowing or refilling.
A ticking noise is heard from inside of the unit.
• This sound is made when internal parts of the unit expand or contract when
the temperature changes.
A white mist is expelled from the indoor unit.
• This may occur just after the unit is turned on when a high level of humidity is
present in the room.
Water or moisture is expelled from the outdoor unit.
• This occurs to expel water or moisture that may have collected in the pipes
or around piping fixtures.
• This occurs to dispel water from the heat exchanger.
The indicators of the remote controller do not light up when operated.
• Turn on the power. " " will be displayed.
indicator is displayed in the remote controller.
• The start and stop or operation mode or set temperature functions of the
remote controller are not available when the
The start and stop functions are not available just after restarting the
unit.
• Wait about three minutes (operation has stopped to prevent damage to the
air conditioner).
The unit started even though the start/stop button was not pushed.
• Is the timer on?
Press the start/stop button to stop the unit.
• Was a distant command sent from the remote controller?
Find out if the remote controller was used.
• Is the indicator lit?
Find out if the remote controller was used.
• Is the automatic (cooling/heating) mode selected?
Press the start/stop button to stop the unit.
• If the power start/stop function is set, operation starts automatically when the
power of the indoor unit is turned on.
• If the power cut auto recovery function is set, operation starts automatically
when the power is turned on after a power cut occurred or the power was
turned off during operation.
* If the power start/stop function or power cut auto recovery function is not
needed, consult the dealer.
Prevent intrusion of heat during air-cooling
• To prevent the intrusion of heat during cooling operation, provide a curtain or a
Carry out ventilation sometimes
• Since the air periodically gets dirty in a room that is kept closed for a long time,
How to clean
• Clear dust away lightly or clean it up with a vacuum cleaner. In the case of
• Do not dry the filter by exposing it to direct sunlight or warming it using
• Washing it in hot water (more than 50 °C) can also result in deformation.
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.
indicator is lit.
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.
blind on the window to block out direct sunlight. Also, do not open the entrance
or exit except in cases of dire necessity.
ventilation is sometimes necessary. When gas appliances are used together
with the unit, special precautions must be taken. If the "LOSSNAY" ventilation
unit developed by our company is used, you can perform ventilation with less
waste. For details on this unit, consult with your dealer.
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:
fire, etc. Doing so can result in the deformation of the filter.
Caution:
The unit stopped even though the start/stop button was not pushed.
• Is the timer on?
Press the start/stop button to restart the unit.
• Was a distant command sent from the remote controller?
Find out if the remote controller was used.
• Is the indicator lit?
Find out if the remote controller was used.
"PLEASE WAIT" is displayed in the remote controller.
• An automatic startup test is being performed (will last for about five minutes).
An error code is displayed in the remote controller.
• A self-diagnostic function is being performed to preserve the air conditioner.
* Do not attempt to make repairs yourself. Turn the main switch off and
contact the dealer from whom you bought the air conditioner. Provide him
or her with the name of the unit and the information displayed in the
remote controller.
The unit does not stop even though the stop button was pressed.
• If the stop button is pressed during the heating operation, the indoor unit fan
sometimes rotates for approximately 1 minute in order to dissipate residual
heat.
• Depending on the indoor unit settings, the indoor unit fan sometimes rotates
for approximately 3 minute after operation stops in order to dissipate residual
heat.
The "Central Control" indication is displayed on the remote controller
display area.
• This indication is displayed when operation is restricted by, for example, the
centralized controller.
• This indication is displayed when the operation setting is set to remote
(external) input.
The operation indicator on the remote controller lights, but the outdoor
unit does not operate.
• If a demand is input to the indoor unit or outdoor unit, the outdoor unit does
not operate.
Air is not blown soon after starting the heating operation.
• The unit requires time to prepare in order to blow air that is sufficiently warm.
Wait a while.
Operation stops while the heating operation dose not reach the set
temperature.
• Frost forms in the outdoor unit when the outside air temperature is low and
the humidity is high. The frost is being melted. Wait approximately 10
minutes.
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