SiUS30-1301
Function General
Function and Control
43
1.4
Branch Selector Unit & Indoor Unit Operation Mode Detail
1: The switch for the Branch Selector unit is operated when pressure equalization control turns
ON after cooling/heating mode of other indoor unit is changed or on the timing of oil returns.
2: If 20RH: ON, depend on indoor control (200 pulse).
If 20RH: OFF, 0 pulse.
<Indoor unit>
<Branch Selector unit>
Name
Electric
symbol
Cooling
Heating
Thermostat ON Thermostat OFF
Stopping
Thermostat ON Thermostat OFF
Stopping
Indoor unit fan
M1F
Remote
controller
setting
Remote
controller
setting
OFF
Remote
controller
setting
LL
OFF
Indoor electronic
expansion valve
Y1E
Normal
opening
degree
0 pulse
0 pulse
Normal
opening
degree
192 pulse
192 pulse
Name
Electric
symbol
Cooling
Heating
Only cooling
Simultaneous
cooling/heating
Electronic
expansion valve
(EVSC)
Y1E
0 pulse
0 pulse
0 pulse
Electronic
expansion valve
(EVHS)
Y2E
480 pulse
(Fully opened)
0 pulse
480 pulse
(Fully opened)
Electronic
expansion valve
(EVLS)
Y3E
480 pulse
(Fully opened)
480 pulse
(Fully opened)
0 pulse
Electronic
expansion valve
(EVH)
Y4E
760 pulse
(Fully opened)
0 pulse
760 pulse
(Fully opened)
Electronic
expansion valve
(EVL)
Y5E
760 pulse
(Fully opened)
760 pulse
(Fully opened)
0 pulse