Disposing Of The Unit; Names And Functions Of Various Parts; How To Operate; On/Off - Mitsubishi Electric PFD-P250-500VM-E Bedienungshandbuch

and a water leak may occur. Inject water into the hose during the periodic
check (six-monthly) to check water-sealing.
Warning:
• Do not splash water over the unit and do not touch the unit with wet
hands. An electric shock may result.
• Do not spray combustible gas close to the unit. Fire may result.
• Do not place a gas heater or any other open-flame appliance where it
will be exposed to the air discharged from the unit. Incomplete com-
bustion may result.
• Never open the panel, except authorized technician. Rotating or high
voltage parts can cause injuries.
Warning:
• Do not remove the front panel or the fan guard from the outdoor unit
when it is running. You could be injured if you touch rotating, hot or
high-voltage parts.
• Never insert fingers, sticks etc. into the intakes or outlets, otherwise
injury may result, since the fan inside the unit rotates at high speed.
Exercise particular care when children are present.
• If you detect odd smells, stop using the unit, turn off the power switch
and consult your dealer. Otherwise, a breakdown, electric shock or fire
may result.
• When you notice exceptionally abnormal noise or vibration, stop opera-
tion, turn off the power switch, and contact your dealer.
• Do not over-cool. The most suitable inside temperature is one that is
within 5 °C of the outside temperature.
• Do not leave handicapped people or infants sitting or standing in the
path of the airflow from the unit. This could cause health problems.
Caution:
• Do not direct the airflow at plants or caged pets.
• Ventilate the room frequently. If the unit is operated continuously in a
closed room for a long period of time, the air will become stale.

2. Names and functions of various parts

Attachment and detachment of filter
Caution:
• In removing the filter, precautions must be taken to protect your eyes
from dust. Also, if you have to climb up on a stool to do the job, be
careful not to fall.
• Turn off the power supply when the filter is changed.

3. How to operate

C
Local
E
c
1
3
2
Normal
PAR-20MAA
Before starting operation
• Start running after the "HO" display has disappeared. The "HO" display
briefly appears on the room temperature display (max. 3 minutes) when the
power is turned on and after a power failure. This does not indicate any fail-
ure of the unit.
• The operation modes of the indoor units' cooling operation, dry operation,
and heating operation are different from those of the outdoor units.
When the operation is started with cooling/dry (heating) and other indoor
units connected to the counterpart outdoor units are already running in the
same operation mode, the remote control displays "
However, the operation comes to stop, and you cannot get a desired mode.
When this occurs, you will be notified by the "
flashes in the liquid crystal display of the remote controller. Set to the opera-
tion mode of other indoor unit by the operation switch button.
The above does not apply to the models that simultaneously run both the
cooling operation and heating operation.
A
TEST RUN
TEMP.

ON/OFF

b
FILTER
CHECK TEST
TIMER SET
4
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" or " " (" ") mode.
" or " " (" ") display that
In case of failure
Warning:
• Never remodel the unit. Consult your dealer for any repair service. Im-
proper repair work can result in water leakage, electric shock, fire, etc.
• If the remote controller displays an error indication, the unit does not
run, or there is any abnormality, stop operation and contact your dealer.
Leaving the unit as it is under such conditions can result in fire or fail-
ure.
• If the power breaker is frequently activated, get in touch with your
dealer. Leaving it as it is can result in fire or failure.
• If the refrigeration gas blows out or leaks, stop the operation of the
unit, thoroughly ventilate the room, and contact your dealer. Leaving
the unit as it is can result in accidents due to oxygen deficiency.
When the unit is not to be used for a long time
• If the unit is not to be used for a long time due to a seasonal change,
etc., run it for 4 - 5 hours with the air blowing until the inside is com-
pletely dry. Failing to do so can result in the growth of unhygienic, un-
healthy mold in scattered areas throughout the room.
• When it is not to be used for an extended time, keep the [power supply]
turned OFF.
If the power supply is kept on, several watts or several tens of watts
will be wasted. Also, the accumulation of dust, etc., can result in fire.
• Keep the power switched ON for more than 12 hours before starting
operation. Do not turn the power supply OFF during seasons of heavy
use. Doing so can result in failure.

1.3. Disposing of the unit

Warning:
When you need to dispose of the unit, consult your dealer. If pipes are re-
moved incorrectly, refrigerant (fluorocarbon gas) may blow out and come
into contact with your skin, causing injury. Releasing refrigerant into the
atmosphere also damages the environment.
• The outdoor units stop when all the indoor units connected to the counter-
part outdoor units stop.
• During heating operation, even if the indoor unit is set to operation while
the outdoor unit is in defrosting operation, operation starts after the de-
frosting operation of the outdoor unit has ended.
3.1. ON/OFF
Start an operation
1. Press the b [ON/OFF] button
Operation lamp V lights up and operation starts.
Stop an operation
1. Press the b [ON/OFF] button again
Operation lamp goes off and operation stops.
• Once the buttons have been set, pressing of the [ON/OFF] button only can
repeat the same operation thereafter.
• During operation, the operation lamp above the [ON/OFF] button lights up.
Caution:
Even if the operation button is pressed immediately after the operation
is once stopped, operation is not restarted for about 3 minutes. This
function protects the machine. It automatically starts operation after the
lapse of approximately 3 minutes.
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