Others; The Smart Way To Use; Caring For The Machine - Mitsubishi Electric City Multi PEFY-P-NMHU-E Operation Manual

3.6. Others

: Displayed when control is executed by a sepa-
rately sold centralized control unit, etc.
: Displayed from the start of heating operation
until the moment warm air blows out.
: This displays indication when some abnormality
CHECK
occurs in the unit.
: When a Button is pressed for any function
which the indoor unit cannot perform, this dis-
play flashes concurrently with the display of
that function.
: In the system in which the [Sensor] display
is indicated as the "remote controller", room
temperature measurement is performed by the
room temperature sensor built into the remote
controller.
: Displayed when it is time to clean the filter.
Press the a [FILTER ( )] Button twice, then
the display is disappeared.

4. The smart way to use

Even minimal steps to care for your air conditioner can help make its use
far more effective in terms of air-conditioning effect, electricity charges,
etc.
Set the right room temperature
• In cooling operation, a temperature difference of about 5 °C [9 °F] between
indoors and outdoors is optimum.
• If the room temperature is raised by 1 °C [2 °F] during air-cooling operation,
about 10 % electric power can be saved.
• Excessive cooling is bad for health. It also results in the waste of electric
power.
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 sea-
sons. (When profuse dust and dirt have accumulated, clean the filter thor-
oughly.)

5. Caring for the machine

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.
How to clean
• Clear dust away lightly or clean it up with a vacuum cleaner. In the case
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.
Prevent intrusion of heat during air-cooling
• To prevent the intrusion of heat during cooling operation, provide a curtain
or a blind on the window to block out direct sunlight. Also, do not open the
entrance or exit except in cases of dire necessity.
Carry out ventilation sometimes
* Except PEFY-P-NMHU-E-F.
• Since the air periodically gets dirty in a room that is kept closed for a long
time, ventilation is sometimes necessary. When gas appliances are used
together with the air conditioner, 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.
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 [122 °F]) can also result in de-
formation.
Caution:
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.
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