Pump Down (Se1, Pd) - LG Multi V5 Service Manual
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Also See for Multi V5:
- Data manual (162 pages) ,
- Manual book (133 pages) ,
- Engineering manual (105 pages)
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OTHER CONTROLS
Setting Optional Modes
Pump Down (SE1, Pd)
Pump Down function gathers the refrigerant in the system, and sends it to the outdoor unit.
Use Pump Down function when there is a refrigerant leak, or if an indoor unit needs to be re-
placed. The maximum refrigerant for outdoor units is size dependent and varies between 14.3
and 37.5 lbs per frame. If the system charge is greater than the volume that can be stored,
a supplemental vacuum pump and third-party storage containers will be required. Set Pump
Down mode on the master outdoor unit, but all outdoor units will function while the system is
in Pump Down. For use on both heat pump and heat recovery systems.
Keep the liquid service valves to each
outdoor unit closed. See figures at right for
instructions on which vapor service valve is
Reset power, then turn No. 5 on the master outdoor unit PCB
Choose SE1, Pd, and then press the red
Operate the system in all indoor unit cooling.
Is the low pressure target satisfied.
Low pressure
Turn all indoor units and outdoor units off.
Turn No. 5 on the master outdoor unit
Reset power.
1. If low pressure falls below 33.2 psi, the system will automatically turn off. Immediately close the vapor service valves. (See figures
above.)
2. If low pressure falls below 44.5 psi (light will blink), immediately close the vapor service valves of all outdoor units.
• Use the Pump Down function while ambient conditions are within the manufacturer's operating temperature ranges:
Indoor Units = 68~89.6°F; Outdoor Units = 41~104°F.
•
Do not run the indoor units in thermo off mode during Pump Down.
• Maximum operation time of Pump Down is thirty (30) minutes (in case low pressure does not satisfy target levels immediately).
76
*Current low
Yes
Pump down complete.
*Current low
Close service valves.
pressure
Press the red SW01C
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Outdoor Unit Service Valves for Heat Recovery
System Pump Down
Outdoor Unit Service Valves for Heat Pump
System Pump Down
pressure
No
Outdoor Unit Service Valves for Heat Recovery
System After Pump Down Is Complete
*Low pressure <44.5
Outdoor Unit Service Valves for Heat Pump
System After Pump Down Is Complete
Table 39: Setting the Pump Down Function.
Settings
Function
oFF (Default)
Pump Down is not enabled.
Pump Down is enabled.
Pd (on)
Display Will Show Low
Pressure.
Open
Closed
Closed
Liquid
Low Pressure
High Pressure
Pipe
Vapor Pipe
Vapor Pipe
Open
Closed
Closed
Liquid
Not Used
Vapor
Pipe
(Keep Closed)
Pipe
Closed
Closed
Closed
Liquid
Low Pressure
High Pressure
Pipe
Vapor Pipe
Vapor Pipe
Closed
Closed
Closed
Liquid
Not Used
Vapor
Pipe
(Keep Closed)
Pipe
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Troubleshooting
