Control Specification SiENBE12-713
100 Function and Control
3.15 Additional Function
3.15.1 Priority Room Setting
Electronic expansion valves are controlled to provide the unit designated as the priority room
with the capacity of other room units.
(Distribution of capacity: Priority room unit --- ΔD Max., other room units --- ΔD -α)
$ Setting method
Turn off the circuit breaker before changing the setting.
Only one room can be set as the priority room.
$ Control start conditions
Priority room setting is made.
AND
“Powerful” signal from the priority room unit is received.
Note: The operation mode of the priority room unit has precedence.
$ Cancellation of control
The control function is canceled when the “Powerful” operation mode is switched off or 20
minutes elapse after “Powerful Operation” started.
3.15.2 POWERFUL Operation Mode
Compressor operating frequency is increased to PI Max. (Max. Hz of operating room unit ΣS)
and outdoor unit airflow rate is increased.
C
room
B
room
A
room
Living
room
C
room
B
room
A
room
Living
room
(R1396)
Normal
operation
When Inverter
powerful-operation is
selected in the
priority room
The prioritised room will be heated/cooled much more quickly
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