LG ARUV Series Service Manual page 292

Troubleshooting Guide
2) Selection of the model of the HR unit
(For 2 rooms)
PRHR020
Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory.
3) Selection of the valve group
Valve group control is the function for connecting 2 valves of an HR unit with an indoor unit of large capaci-
ty(More than12kw) using a Y-branch.
No. valve group
Indoor unit
Indoor unit
HR unit
Indoor unit
Indoor unit
Notice: If you installed by valve grouping you need to use manual addressing.
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Only for training and service purposes
(For 3 rooms)
Valve #1 and #2 Valve #2 and #3
in group control in group control
HR unit
Indoor unit
Indoor unit
HR unit
Large indoor unit
PRHR040
Valve #3 and #4
in group control
Indoor unit
Large
indoor unit
Indoor unit
HR unit
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(For 4 rooms)
PRHR040
Valve #1 and #2,
Valve #3 and #4
in group control
Large
indoor unit
HR unit
Large
indoor unit
Large indoor unit
Indoor unit
Indoor unit
LGE Internal Use Only