Functions - LG MULTI V Service Manual

Functions

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
Cooling mode
Heating mode
Cooling or heating
Table 2. Valve control by mode change timer
Operating mode
Cooling
Heating
Stop or ventilation
Power on
Close
After 30 seconds
Open
Close
Cooling or heating
Stop or ventilation
Mode change
H/P gas valve
timer
120 ≤ timer
0 < timer < 120
timer = 0
180 ≤ timer
0 < timer < 180
timer = 0
Cooling mode :
0 < timer < 5
Heating mode : Low
pressure gas valve
Timer = 0
Cooling operation Heating operation
Close
Open
Open
Changing mode
Heating
Cooling
L/P gas valve
Keep
Close
Close
Keep
Close
Open
Close
➔ Close
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Stop state
Open Keep
Close Keep
Close Close
Mode change timer
120 seconds
180 seconds
120 seconds
During heating : 60 seconds
During cooling : 0 seconds
Balancing valve
Keep Close
Close Open
Open Close
Keep Close
Close Close
Close Close
Keep Close
Keep Close