Note For Multi System - Daikin CTXU25G2V1B Service Manual

SiBE12-908

3.11 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 HEAT Mode in any room after this will give priority to HEAT.
In this situation, the air conditioner running in FAN Mode will go on standby, and the operation lamp will flash.
HUMID HEAT operation/FRESH AIR SUPPLY VENTILATION
• When the indoor units in both 2 rooms are set to HUMID HEAT operation/FRESH AIR SUPPLY VENTILATION, the indoor unit in either 1 of the
room operate HUMID HEAT operation/FRESH AIR SUPPLY VENTILATION.
(The indoor units in both 2 rooms do not simultaneously go into HUMID HEAT operation/FRESH AIR SUPPLY VENTILATION.)
Priority is given to the indoor unit in either one of the rooms with the mode selected earlier. The indoor unit in the other room with mode selected
later will change its state according to the operation mode with humidifying operation/ventilation settings. Refer to the following examples 1
through 4. Neither one of the indoor units cannot go into humidifying operation/ventilation while the indoor units are in a standby state. (Refer to
the information on selecting operation mode.)
1. When the indoor units in both 2 rooms are set to HUMID HEAT operation.
1) Priority will be given to the indoor unit in the first selected room, and the indoor unit will go into humidifying operation
while the indoor unit in the second selected room will go into a humidifying operation standby state.
The multi-monitor indicator will be lit yellow in approx. 20 seconds.
2) When the humidity of the first selected room reaches a target level, the indoor unit will go into a humidifying operation
standby state. Then the indoor unit in the other room will go into HUMID HEAT operation automatically.
3) When the humidity of the first selected room drops, the indoor unit of the room will return to HUMID HEAT operation. At
that time, the indoor unit in the second selected room will go into a humidifying operation standby state.
• When the indoor unit in the first selected room is in "CONT" humidifying the indoor unit of the second selected room will not switch
automatically.
2. When the indoor unit in the first selected room is in HUMID HEAT operation and the
indoor unit in the second selected room is in FRESH AIR SUPPLY VENTILATION.
1) When the HUMID HEAT operation of the indoor unit in the first selected room stops, the ventilation of the second
selected room will start.
• Even though the humidity of first selected room reaches a target level, the ventilation of the second selected room will not start unless the
HUMID HEAT operation of the indoor unit in the first selected room stops.
3. When the indoor unit in the first selected room is in FRESH AIR SUPPLY
VENTILATION and the indoor unit in the second selected room is in HUMID HEAT
operation.
1) When the ventilation of the first selected room stops, the humidifying operation of the second selected room will start.
• The humidifying operation of the second selected room will not start unless the ventilation of the first selected room stops.
4. When the indoor units in both 2 rooms are set to FRESH AIR SUPPLY
VENTILATION.
1) Priority will be given to the indoor unit in the first selected room, and the indoor unit in the second selected room will be
in a ventilation standby state. At that time, no automatic switching explained in 1 will be possible. The ventilation of the
second selected room will start after the ventilation of the first selected room stops.
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Installation / Operation Manual
Operation Manual
B
Outdoor room
unit
A
Living
room
3P232703-1
100