4
● For power supply, be sure to use a
separate power circuit dedicated to the
air conditioner.
■ To install the air conditioner in the
following types of environments, consult
the shop.
● Places with an oily ambient or where
steam or soot occurs.
● Salty environment such as coastal
areas.
● Places where sulfide gas occurs such
as hot springs.
● Places where snow may block the
outdoor unit.
The drain from the outdoor unit must be
discharged to a place of good drainage.
Installation site
■ For installation, choose a place as
described below.
● A place solid enough to bear the
weight of the unit which does not
amplify the operation noise or
vibration.
● A place from where the air
discharged from the outdoor unit or
the operation noise will not annoy
your neighbours.
Consider nuisance to your
neighbours from noises
Electrical work
● Relocating the air conditioner requires
specialized knowledge and skills.
Please consult the shop where you
bought the air conditioner if relocation is
necessary for moving or remodeling.
System relocation
NOTE
<Note for heat pump multi system>
When two or more indoor units have no precedence-
room settings and are set to modes that differ from
each other, the indoor unit which is operated first
activates, while the other indoor unit does not activate
and the OPERATION lamp blinks. (This is not a
malfunction.)
An indoor unit that is not in operation will
automatically start and operate in the mode in which
a previously operated indoor unit was stopped.
However, if the unit in operation provides only COOL
and DRY modes, simultaneous operation is
possible.
Note for Multi
System
● Precedence-room setting
When setting the preference-room during installation, the
indoor unit’s operation mode always takes priority.
When the precedence-setting room unit is operated in
POWERFUL mode, there are times that air conditioners
in other rooms will temporarily stop in order to centralize
power to the unit in the room.
Please adjust the precedence-room setting to match your
life style. Moreover, for precedence-room settings, please
consult the service shop where you bought the unit.
∗ Precedence-room setting is applied to only 4MX80,
4MK90.
● COOL/HEAT mode
This mode is used to set the unit to only cool or heat. For
information on using this mode, consult the service shop
where you bought the unit.
∗ COOL/HEAT mode is applied to only 4MX80, 4MK90.
● Precautions for outdoor unit connected to
RMK(X)140
• In heating operation, when all indoor units are stopped,
the outdoor unit stops its operation automatically after 5
minutes. This is a part of preparation process for the
next operation, not a failure.
• In heating operation, no warm air may come out
temporarily. This is for an oil recovery operation
performed at certain time intervals, not a failure.
• In simultaneous operation at two or more rooms, when
heating operation is performed at one room, cooling
operation cannot be performed at other rooms.
Whichever mode selected first is preferred.
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