Functions - LG MULTIV III 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
Cooling mode
Heating mode
Cooling or heating
Table 2. Valve control by mode change timer
Operating
mode
Cooling
Heating
Stop or
ventilation
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Only for training and service purposes
Power on
Close
After 30 sec.
Open
Close
Changing mode
Cooling or heating
Heating
Cooling
Stop or ventilation
Mode change H/P gas
timer
120 ≤ timer
0 < timer < 120
timer = 0
180 ≤ timer
0 < timer < 180
timer = 0
Cooling mode :
0 < timer ≤ 5
Heating mode :
Low pressure
Timer = 0
gas valve
➠ Close
- 17 -
Cooling Heating
operation operation
Close Open
Open Close
Open Close
Mode change timer
120 sec
180 sec
120 sec
During heating : 60 sec
During cooling : 0 sec
L/P gas
valve valve
Keep Keep
Close Close
Close Open
Keep Keep
Close Close
Open Close
Keep
Close
Keep
Functions
Stop state
Keep
Keep
Close
Balancing
valve
Close
Open
Close
Close
Close
Close
Close
Close
LGE Internal Use Only