LG Multi V CRUN Series

Service Manual 165
Operation detail
Linear Expansion Valve(LEV) Control
At starting
Feed back
control
At starting
Feed back
control
Deicing
LEV
for Outdoor Unit
Fully open
Fully open
Base Pulse
Feed back
control
Deicing
LEV for Indoor Unit
Base Pulse
Feed back
control
Base Pulse
Feed back
control
Fully Open
Fully Closed
Fully Closed
open
open
Fully Open
On state
indoor unit
Off state
Indoor unit
Fully Closed
Fully Closed
Fully Closed
Fully Closed
Fully Open
Thermo off state
Indoor unit
(1) Control type
■
Heating Cooling
∑Qj
Step_Fan
(Cooling)
∑Qj
7~12 3 7~12
13~24 3 13~24
25~50 4 25~50
51~109 4 51~109
Step_Fan
(Heating)
3
3
4
4
Step_Fan Left Right
4 High High
3 Low Low
2 High X
1 Low X
0XX
∑Qj : Total capacity summation of indoor units
(in Btu/h unit)
■ Control of Outdoor Unit Fan
(1) After compressor start, the rotation speed of two fans is High/High for 1 minute, and then step control which
is considered the total capacity and indoor air temperature is executed.
(2) Steps of outdoor unit fan speed : 4 Steps
(3) Determination of fan speed(Step_Fan)