Pump Out For Heat Pump Systems - LG Multi V5 Service Manual

Pump Out for Heat Pump Systems

Example of Pump Out Function When Slave2 Outdoor Unit Experiences Inverter Compressor Failure.
Closed Open
Slave 2 Outdoor Unit
Heating Mode
Liquid Not Used
Pipe (Keep
Closed)
1. Verify the liquid pipe of the outdoor unit is closed for Pump Out
operation. Open the vapor pipe service valve.
2. Operate Pump Out function.
3. Close the vapor pipe service valve of unit after Pump Out is
complete.
4. Replace inverter compressor, eliminate remaining refrigerant of
the corresponding outdoor unit, and perform Vacuum procedure
using Vacuum Mode.
5. Add refrigerant using the Refrigerant Auto Charge Function.
Slave 1 Outdoor Unit
Heating Mode
Vapor Liquid
Pipe Pipe
For Heat Pump Systems,
Not Used (Keep Closed)
Due to our policy of continuous product innovation, some specifications may change without notification.
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OTHER CONTROLS
Not Used Vapor
(Keep Pipe
Closed)
Figure 29: Close Up of Heat Pump Service Ports and Refrigerant
Charge Valve.
Liquid pipe
Vapor pipe
Setting Optional Modes
Master Outdoor Unit
Heating Mode
Liquid Not Used Vapor
Pipe (Keep Pipe
Closed)
Service Port
79