Mitsubishi Electric CITY MULTI PKFY-P VBM-E Série Manuel D'utilisation page 19

11. Trouble Shooting
Having trouble?
Noise is louder than specifi cations.
Nothing appears in the wireless remote controller display, the display
is faint, or signals are not received by the indoor unit unless the re-
mote controller is close.
The operation lamp near the receiver for the wireless remote controller
on the indoor unit is blinking.
Warm air blows from the indoor unit intermittently when heating mode
is off or during fan mode.
The damper opens and closes automatically.
(For PFFY-P·VKM-E series)
Air outlet control (PFFY-P·VKM series)
This unit is automatically controlled that air comes out simultaneously from the upper and lower air outlets so that the room can be cooled or heated
effectively.
Description of operation
Operation
Air fl ow
Upper and lower air fl ow
Room temperature
and set temperature
Conditions
are different.
• Be sure to keep the area around the damper of the lower air outlet free of any objects.
This unit can be set to blow out air from the upper air outlet only by changing the switch setting on the address board (ask the dealer).
Range of application
The range of working temperatures for both the indoor and outdoor units of the series Y, R2, Multi-S is as below.
Caution:
The use of your air conditioner outside the range of working temperature and humidity can result in serious failure.
Mode
Cooling
Heating
Note: As an applicable humidity standard for both indoors and outdoors, we recommend use within a range of 30 - 80% relative humidity.
Warning:
If the air conditioner operates but does not cool or heat (depending on model) the room, consult your dealer since there may be a refrigerant
leak. Be sure to ask the service representative whether there is refrigerant leakage or not when repairs are carried out.
The refrigerant charged in the air conditioner is safe. Refrigerant normally does not leak. However, if refrigerant gas leaks indoors, and
comes into contact with the fi re of a fan heater, space heater, stove, etc., harmful substances will be generated.
COOL
Upper air fl ow Upper air fl ow only
Room temperature
is close to set tem-
perature or thermo-
off.
Indoor unit
PUHY
15 °C - 24 °C WB –5 °C - 43 °C DB
15 °C - 27 °C DB –15 °C - 15.5 °C WB
Here is the solution. (Unit is operating normally.)
The indoor operation sound level is affected by the acoustics of the par-
ticular room as shown in the following table and will be higher than the
noise specifi cation, which was measured in an echo-free room.
High sound-ab-
sorbing rooms
Broadcasting
Location
studio, music
examples
room, etc.
Noise levels 3 to 7 dB
The batteries are low.
Replace the batteries and press the Reset button.
If nothing appears even after the batteries are replaced, make sure that
the batteries are installed in the correct directions (+, –).
The self diagnosis function has operated to protect the air conditioner.
Do not attempt to repair this equipment by yourself.
Turn off the power switch immediately and consult your dealer. Be sure
to provide the dealer with the model name.
When another indoor unit is operating in heating mode, the control valve
opens and closes occasionally to maintain stability in the air conditioning
system. This operation will stop after a while.
* If this will cause an undesirable rise in the room temperature in small
rooms, etc., stop the operation of the indoor unit temporarily.
The damper is automatically controlled by a microcomputer according to
the air fl ow temperature and operation time of the air conditioner.
DRY
Upper and lower air fl ow
(Normal condition
(in heating))
—
Outdoor unit
PURY
–5 °C - 43 °C DB
–12 °C - 15 °C WB
Low sound-ab-
Normal rooms
sorbing rooms
Reception
Offi ce, hotel
room, hotel
lobby, etc.
6 to 10 dB
HEAT
Upper air fl ow Upper and lower air fl ow
During defrosting
operation, start of
operation, thermo-
off
PUMY
–5 °C - 46 °C DB
–12 °C - 15.5 °C WB
room
9 to 13 dB
FAN
—
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