Pump Out - LG Multi V ARWM072CAS5 Service Manual

Function

4.9 Pump Out

This function gathers the refrigerant to other ODU and IDU.
Use this function in case of compressor failure, ODU parts defect, leakage.
Setting method
Close liquid service valve of each unit.
Refer the right side figures of this page
and open the proper valve by each system.
Power reset after DIP switch setting of ODU
Refer to DIP switch setting page
(General case, Inv. Comp failure case)
Press the red button (SW01C)
All IDU heating operation
Satisfy low pressure target?
Note 2)
Low pressure > 229 kPa(33.2 psi)
Power reset after DIP switch off
[Note]
If low pressure become under 307 kPa(44.5 psi) (blink), close the gas service valve of all ODU immediately.
If low pressure descends below 229 kPa(33.2 psi), the system turns off automatically. Close gas service valve immediately.
This function is operating only Heat Pump model.
Caution
1.Use pump out function within guaranteed temperature range
IDU : 10~32 ℃ [50~89.6 ℉]
ODU : 5~40 ℃ [41~104 ℉]
2. Make certain that IDU doesn't run with thermo off mode during operation
3. Pump out function takes 2~5 minutes after compressor start.
Make certain that IDU doesn't run with thermo off mode during operation
(in case low pressure doesn't go down)
Yes
*Current low
Pump out completed
pressure
Press the red button
(SW01C)
IDU, ODU OFF
*Current low
pressure
No
Note 1)
*Current low pressure
under 307 kPa(44.5 psi)
(blink)
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All right reserved. Only for training and service purposes
[Case 1] ODU Service Valve Setting
(for Heat Recovery System)
Close Close Open
Liquid Low pressure High pressure
Pipe Gas Pipe Gas Pipe
[Case 2] ODU Service Valve Setting
(for Heat Pump System)
Close Close Open
Liquid No used Gas
Pipe (Keep closed) Pipe
[Case 1] ODU Service Valve Setting
(for Heat Recovery System)
Close Close Close
Liquid Low pressure High pressure
Pipe Gas Pipe Gas Pipe
[Case2] ODU Service Valve Setting
(for Heat Pump System)
Close Close Close
Liquid No used Gas
Pipe (Keep closed) Pipe