5
Multi Connection
Note for Multi System
A multi system has one outdoor unit connected to multiple indoor units.
Selecting the operation mode
When the priority room setting is active
but the set unit is not operating or when
the priority room setting is inactive
When more than one indoor unit is operating, priority is given to
the first unit that was turned on.
In this case, set the units that are turned on later to the same
operation mode as the first unit.
Otherwise, they will enter the standby state, and when using the wired
remote controller the centralized control icon “CENTRAL CONTROL”
will light up; this does not indicate malfunction.
NOTE
Notes on operation mode for a multi system
• COOL, DRY and FAN operation may be used at the same time.
• AUTO operation automatically selects COOL operation or HEAT operation based on the indoor temperature.
Therefore, AUTO operation is available when selecting the same operation mode as that of the room with the first unit to be turned on.
CAUTION
• Normally, the operation mode in the room where the unit is first started is given priority, but the following situations are exceptions to this rule.
If the operation mode of the first room is FAN operation, then using HEAT operation in any room after this will give priority to HEAT operation.
In this situation, the indoor unit operating in FAN mode will switch to standby, and when using the wired remote controller the centralized
control icon “
CENTRAL CONTROL” will light up.
With the priority room setting active
Refer to “
Priority room setting
” on the next page.
NIGHT QUIET mode (Available only for COOL operation)
NIGHT QUIET mode requires initial programing during installation. Please consult your retailer or dealer for assistance.
NIGHT QUIET mode reduces the operation noise of the outdoor unit during the night-time hours to prevent annoyance to neighbours.
• NIGHT QUIET mode is activated when the temperature drops 10.8°F (6°C) or more below the highest temperature recorded that day.
When the temperature difference between the current outdoor temperature and the maximum outdoor temperature becomes less than
7.2°F (4°C), this function will be canceled.
• NIGHT QUIET mode slightly reduces the cooling efficiency of the unit.
QUIET OUTDOOR UNIT operation (Function unavailable in the FFQ series)
For details on QUIET OUTDOOR UNIT operation, refer to the operation manual included with the remote controller.
When the priority room setting is active but the set unit is not operating or when the
priority room setting is inactive
When using the QUIET OUTDOOR UNIT operation feature with a multi system, set all indoor units to QUIET OUTDOOR
UNIT operation using their remote controllers.
When canceling QUIET OUTDOOR UNIT operation, simply cancel the mode on one of the operating indoor units using their remote controller.
However QUIET OUTDOOR UNIT operation will remain displayed on the remote controllers for the other rooms.
We recommend you cancel operation in all rooms using their remote controllers.
With the priority room setting active
Refer to “
Priority room setting
” on the next page.
Room A
Room B
Room C
Room D
Outdoor unit
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