Functions - LG Multi V ARWM072CAS5 Service Manual

Functions

1. Basic Control
1.1 Normal Operation
Actuator
High pressure gas valve
Low pressure gas valve
Liquid valve
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.
Table 1. Mode change timer calculation
Previous mode
Stop or ventilation
Heating
Heating mode
Cooling or heating
Table 2. Valve control by mode change timer
Operating mode
Cooling
Heating
Stop or ventilation
Actuator
Close
After 30 Second Open
Close
Mode change timer
120 ≤ timer
0 < timer < 120
timer = 0
180 ≤ timer
0 < timer < 180
timer = 0
0 < timer < 5 Cooling mode : Close
Timer = 0
Cooling operation Heating operation
Close
Open
Open
Changing mode
Cooling or heating
Heating
Cooling
Stop or ventilation
H/P gas valve L/P gas valve
Keep
Close
Close
Keep
Close
Open
Heating mode :
Low pressure
gas valve
➞ Close
- 53 -
Copyright © 2020 LG Electronics. Inc.
All right reserved. Only for training and service purposes
Stop state
Open Keep
Close Keep
Close Close
Mode change timer
120 sec
180 sec
120 sec
During heating : 60 sec
During cooling : 0 sec
Balancing valve
Keep Close
Close Open
Open Close
Keep Close
Close Close
Close Close
Keep Close
Keep Close
Functions