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BEFORE OPERATION
4 BEFORE OPERATION
!
C A U T I O N
•
Supply electrical power to the system for approximately 12 hours
before start-up after long shutdown. Do not start the system
immediately after power supply, it may cause a compressor failure,
because the compressor is not heated well.
•
Make sure that the outdoor unit is not covered with snow or ice. If
covered, remove it by using hot water (approximately 50ºC). If the water
temperature is higher than 50ºC, it will cause damage to plastic parts.
4.1 EFFICIENT USE OF INDOOR UNIT
•
Do not leave a window or a door open.
The operating efficiency will be decreased.
It may cause dew condensation of the indoor unit. (Ventilate
a room sufficiently too.)
•
Attach a curtain or a blind to a window.
Direct sunlight is prevented and the cooling efficiency will be
increased.
•
Do not use heating appliances during the cooling operation
as possible.
The cooling efficiency will be decreased. It may cause dew
condensation and dropping dew.
4.2 EFFICIENT USE OF COOLING AND HEATING
COOLING
1 Air flow direction: the appropriate air outlet angle is approx.
35º. If the cooling is not sufficient, change the air flow
direction. Pay attention to dew drop which may occur due to
the long cooling operation with low louver angle.
35°
Air outlet angle
1 Air flow volume: "AUTO" should be usually used.
2 Temperature: the recommended set temperature is 27 to 29ºC.
If the cooling is not sufficient, set the lower temperature.
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N O T E
About Multi-Split system
When the number of indoor unit or the operating mode is changed, the air outlet temperature may be changed and the indoor temperature is changed.
In this case, set as follows.
•
During cooling: lower slightly the temperature setting.
•
During heating: raise slightly the temperature setting.
•
Refer to remote control Installation and operation manual.
3
PMML0550 rev.0 - 12/2020
35°
Louver
angle
(above center)
•
When the system is started after a shutdown longer than approximately
3 months, it is recommended that the system be checked by your
service contractor.
•
Turn OFF the main switch when the system is stopped for a long
period of time. If the main switch is not turned OFF, electricity is
consumed, because the oil heater is always energized during
compressor stopping.
•
Use a circulator if warm air stays around ceiling.
The comfortability will be increased. Contact your distributor
for the detail.
•
Change the air flow direction downward if the ceiling surface
gets dirty.
It is recommended to change the air flow direction by approx.
30º downward from the levelness.
•
Turn OFF the main power source if the indoor unit is not
used for a long time.
If not, the standby electricity charges will have to be paid
even if the indoor unit is unused.
HEATING
1 Air flow direction: the appropriate air outlet angle is approx.
60º. If the heating is not sufficient, change the air flow
direction.
60°
Air outlet angle
3 Air flow volume: "AUTO" should be usually used.
4 Temperature: the recommended set temperature is 18 to 20ºC.
If the heating is not sufficient, set the higher temperature.
60°
Louver
angle
(above center)
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