LG ARUV Series Service Manual page 283

* Measure the resistance of 4way valve
** Confirm the 4way valve coil is inserted to the end
*** When power is supplied in order as follow
(Sub2 Sub1 Main)
3 rd number indicates outdoor quantity at Main PCB
7-segment LED
- Outdoor unit 1set : 44-capacity(or 10)-..
- Outdoor unit 2set : 44-50-capacity(or 20)-..
- Outdoor unit 3set : 44-50-50-capacity(or 30)- ..
***** Checking method for outdoor unit of 3unit system
(Main + Sub1 + Sub2)
Close all the SVC valves of high / low pressure com-
mon pipe
Operate system
Check the difference of high and low pressure with
LGMV for each unit (Main, Sub1, Sub2)
If there is a unit in which the difference is not
increased then the 4way valve of that unit is defective
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Location of 4way valve connector on
Main / Sub PCB (marked as 4way)
**** Check the output voltage of terminal socket
during heating operation
- 283 -
Troubleshooting Guide
LGE Internal Use Only