LG MULTIV III - Functions

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Copyright ©2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1.1 Normal Operation
1.2 Starting Control(Heating Mode Only)
If the system is operated in the heating mode, all high pressure gas valves are opened
1.3 Valve Control
Mode change timer is calculated as Table 1, and valves are controlled by Mode change timer according to
Table 2.
1. Basic Control
Open
Open
Close
Cooling
operation
Stop state
Heating
operation
Power onActuator
KeepOpenCloseHigh pressure gas valve
KeepClose
After 30 sec.
Open
Low pressure gas valve
CloseCloseCloseLiquid valve
Mode change timerChanging modePrevious mode
180 secHeatingCooling mode
120 secCoolingHeating mode
During heating : 60 sec
During cooling : 0 sec
Stop or ventilationCooling or heating
120 secCooling or heatingStop or ventilation
Balancing
valve
L/P gas
valve
H/P gas
valve
Mode change
timer
Operating
mode
CloseKeepKeep180 ≤ timer
Heating
CloseCloseClose0 < timer < 180
CloseCloseOpen timer = 0
Keep
Open
Close
Keep
Close
Keep Close
Close
Open
Close
Close timer = 0
Close0 < timer < 120
Cooling mode :
Close
Heating mode :
Low pressure
gas valve
➠ Close
0 < timer ≤ 5
Timer = 0
Stop or
ventilation
Keep120 ≤ timer
Cooling
Table 2. Valve control by mode change timer
Table 1. Mode change timer calculation
Functions
Functions