Si12-714
Instruction
Operation Manual
147
2.14
Note for Multi System
Note for Multi System
〈〈
What is a “Multi System”?
〉〉
This system has one outdoor unit connected to multiple indoor units.
Selecting the Operation Mode
1. With the Priority Room Setting
present but inactive or not present.
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 (*1) as the first unit.
Otherwise, they will enter the Standby Mode, and the operation lamp will flash; this does not indicate malfunction .
(*1)
• COOL, DRY and FAN mode may be used at the same time.
• AUTO mode automatically selects COOL mode or HEAT mode based on the room temperature.
Therefore, AUTO mode 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 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 Mode
, then using
Heating Mode
in any room after this will give priority to
heating.
In this situation, the air conditioner running in FAN Mode will go on standby, and the operation lamp will flash.
2. With the Priority Room Setting active.
See “Priority Room Setting” on the next page.
NIGHT QUIET Mode (Available only for cooling operation)
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 night time 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.
OUTDOOR UNIT QUIET Operation
1. With the Priority Room Setting present but inactive or not present.
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.
2. With the Priority Room Setting active.
See “Priority Room Setting” on the next page.
Cooling / Heating Mode Lock (Available only for heat pump models)
The Cooling / Heating Mode Lock requires initial programming during installation.Please consult your retailer or dealer
for assistance. The Cooling / Heating Mode Lock sets the unit forcibly to either Cooling or Heating Mode. This function
is convenient when you wish to set all indoor units connected to the Multi system to the same operation mode.
C
C
room
room
B
B
room
room
A
A
room
room
D
D
room
room
C
room
B
room
A
room
D
room
Outdoor
unit
