Specifications

SiUS12-928_A Control Specification
Function and Control 54
Detail The following are examples of control which function in each mode by the electronic expansion
valve control.
1: When all the indoor units are operating, “liquid pipe temperature control” is conducted.
2: “SC (subcooling) control” is conducted for the operating indoor units, when some of the units are not operating.
3: “Liquid pipe temperature control for stopped room” is conducted for the non-operating indoor units.
×




×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×


×


×
×
×


×
×
×
×
×
×
×
×

×
×

×
×
×
×

×
×
×
×



×
×
×
×
×
×
×
×
×
×
×




×
×
×
×
×
×
×
×
×
×
×




×




×
×

×
×
×
×

×

×
×

×

×
×
×
×
×
×
×
×
×
×
×
×

×
×

×
×
×
×

×
×
×
×
×
×

×
×
×
×
×
×
×
×
×
×
Fully closed when power is turned on
Open control when starting
(Control of target discharge pipe temperature)
Control when the operating room is changed
(Control of target discharge pipe temperature)
Pressure equalizing control
Open control when starting
(Control of target discharge pipe temperature)
Control when the operating room is changed
(Control of target discharge pipe temperature)
(Defrost control)
Pressure equalizing control
Open control when starting
Continue
Pressure equalizing control
Gas pipe isothermal control SC (supercooling) control Control when frequency changed Control for abnormally high discharge pipe temperature Liquid pipe temperature control for stopped rooms Dew prevention control for indoor roto Oil recovery control Indoor freeze-up protection control Liquid pipe temperature control
When power is turned on
Cooling, 1 room operation
Cooling, 2 rooms operation
to
Cooling, 4 rooms operation
Stop
Heating, 1 room operation
Heating, 2 rooms operation
Stop
Heating operation
Control of discharge pipe
thermistor disconnection
Stop
Operation pattern
 : function
× : not function
(R10273)
All
rooms
All
rooms
All
rooms
All
rooms
All
rooms
All
rooms
All
rooms
All
rooms
All
rooms