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SiBE18-821_C
RA Indoor Unit
Operation Manual
191
3.1.12 Note for Multi System
29
Note for Multi System
Multi system has one outdoor unit connected to multiple indoor units.
NOTE
CAUTION
Page 19
A room
B room
C room
D room
Outdoor unit
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 the
multimonitor lamp will flash: this does not indicate malfunction.
The COOL/HEAT mode lock requires initial programming during installation. Please consult your authorized dealer for
assistance. The COOL/HEAT mode lock sets the unit forcibly to either COOL or HEAT operation. This function is convenient
when you wish to set all indoor units connected to the multi system to the same operation mode.
• COOL, DRY and FAN operation may be used at the same time.
• AUTO operation automatically selects COOL operation or HEAT operation based on the room 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.
• Normally, the operation mode in the room where the unit is first run is given priority, but the following situations are exceptions, so please keep
this in mind.
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 air conditioner running in FAN operation will go on standby, and the multi-monitor lamp will flash.
NIGHT QUIET mode requires initial programming during installation. Please consult your retailer or dealer for assistance.
NIGHT QUIET mode reduces the operation noise of the outdoor unit during the nighttime hours to prevent annoyance to
neighbors.
• The NIGHT QUIET mode is activated when the temperature drops 5˚C or more below the highest temperature recorded that day.
Therefore, when the temperature difference is less than 5˚C, this function will not be activated.
• NIGHT QUIET mode reduces slightly the cooling efficiency of the unit.
Refer to OUTDOOR UNIT QUIET operation.
When using the OUTDOOR UNIT QUIET operation feature with the multi system, set all indoor units to OUTDOOR UNIT
QUIET operation using their remote controllers.
When clearing OUTDOOR UNIT QUIET operation, clear one of the operating indoor units using their remote controller.
However OUTDOOR UNIT QUIET operation display remains on the remote controller for other rooms.
We recommend you release all rooms using their remote controllers.
Notes on operation mode for multi system
NIGHT QUIET mode (Available only for COOL operation)
Selecting the operation mode
OUTDOOR UNIT QUIET operation
COOL/HEAT mode lock
3P255639-1
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