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_TROUBLE SHOOTING GUIDE BOOK __
■ Detailed information
•
This function is used with heat pump and heat recovery.
*Note : The amount of refrigerant that can be pumped out is limited by the amount of refrigerant that
can be stored in the outdoor unit and additional refrigerant storage containers may need to
be used. The maximum amount of refrigerant for Multi V 5 is size dependent and varies be-
tween 14.3 and 37.5 lbs / frame. If the system charge is greater than the volume that can be
stored, a supplemental storage device will be required to totally evacuate the system.
· Use pump down function within guaranteed temperature range.
-
IDU : 20~32℃ [68~89.6℉] / ODU : 5~40℃ [41~104℉]
· Make certain that IDU doesn't run with thermo off mode during operation.
· Maximum operation time of pump down function is 30 min. (in case low pressure doesn't go down)
5.2 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 the function
Function Option
Pump Out SE 2 Po (display "Low Pressure"), oFF
■ Flow Chart
*Note
1) If low pressure become under 307kPa, close the gas service valve of all ODU immediately.
*Note
2) If low pressure descends below 229 kPa, the system turns off automatically. Close gas service
valve immediately. This function is operating only Heat Pump model.
- 44 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.12 Pump Out
This function gathers the refrigerant to other ODU and IDU.
Use this function in case of compressor failure, ODU parts defect, leakage.
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)
All IDU heating operation
Press the red button (SW01C)
Note 1)
Note 2)
Yes
No
Low pressure > 229kpa
IDU, ODU OFF
Power reset after Dip switch off
Pump out completed
Press the red button
(SW01C)
Satisfy low pressure target?
[Note]
If low pressure become under 307kPa (blink), close the gas service valve of all ODU immediately.
If low pressure descends below 229 kPa, 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 min. after compressor start.
Make certain that IDU doesn't run with thermo off mode during operation
(in case low pressure doesn't go down)
*Current low
pressure
*Current low pressure
under 307kPa (blink)
*Current low
pressure
[Case 1] ODU Service Valve Setting
(for Heat Recovery System)
[Case 2] ODU Service Valve Setting
(for Heat Pump System)
[Case 1] ODU Service Valve Setting
(for Heat Recovery System)
[Case2] ODU Service Valve Setting
(for Heat Pump System)
Liquid
Pipe
Close
Close
Close Close Close
Close Close Close
Close Open
Close Open
Low pressure
Gas Pipe
High pressure
Gas Pipe
Liquid
Pipe
No used
(Keep closed)
Gas
Pipe
Liquid
Pipe
No used
(Keep closed)
Gas
Pipe
Liquid
Pipe
Low pressure
Gas Pipe
High pressure
Gas Pipe
Setting method
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