Pump Out - LG ARUN Series Service Manual

4.7 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 SVC V/V of each unit.
Open gas SVC V/V of each unit.
Close high/low pressure common pipe
of corresponding ODU
Main PCB
Power reset after Dip switch setting of ODU
SW01B
General case: No.10,14 on
SW02B
Inv Compressor failure:No.3,10,14 on
Main PCB
Press the black button
SW01V
All IDU heating operation
Satisfy low pressure target?
Note 2)
Low pressure > 229 kpa(33.2 psi)
Main PCB
SW02V
SW01V
Power reset after Dip switch No.(3), 10, 14 off
[Note]
If is displayed, close gas SVC V/V of all ODU immediately.
If low pressure descends below 229 kPa (33.2 psi), the system turns off automatically. Close gas SVC V/V immediately.
Caution
1.Use pump out function within guaranteed temperature range
IDU : 10°C(50°F) ~ 30°C(86°F)
ODU : 5°C(41°F) ~ 40°C(104°F)
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)
4. Press black+red button during operation to end pump out.(IDU,ODU off)
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Yes
Pump out completed
Press the black button
IDU, ODU OFF
No
Note 1)
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Function
ODU SVC V/V Setting
Close Open
Ball Valve(Liquid Pipe)
Ball Valve(Gas Pipe)
ODU SVC V/V Setting
Close Close
Ball Valve(Liquid Pipe)
Ball Valve(Gas Pipe)
LGE Internal Use Only
Elbow
Elbow