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Installation Manual
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.
Generation 4 Equipment
The latest versions of LG’s indoor and outdoor (air/water source) units are designated Generation 4 (Gen 4). For Gen 4 units to operate with
Gen 4 features, the air conditioning system must meet the following requirements:
• All indoor units, heat recovery units, and air/water source units
must be Gen 4.
• All air/water source units must have Gen 4 software
installed.
• Air/water source units DIP switch 3 must be set to ON
(factory default setting is OFF).
• All controllers must support Gen 4 features.
The figure at right shows the ODU DIP switch. The "System Com-
ponent Combinations and Operation Status" table lists how combin-
ing different components will affect system operation. The "Serial
Numbers or Air/Water Source Units with Gen 4 Software" table lists
the serial numbers of air and water source units that have Gen 4
software. All air and water source units, indoor units, heat recovery
units, and controllers in a system must be Gen 4 compatible or the
system will not operate with Gen 4 features.
Air / Water
Source
Units*
Indoor Unit(s)**
Heat Recovery
Unit(s)
Outdoor Unit DIP
Switch No. 3
Operation Status
Gen 4
Gen 4 ONLY
Model 2A ONLY
Must be ON
System will operate WITH Gen. 4 features.
Gen 4
Gen 4 ONLY
Model 2A ONLY
OFF
System will operate but WITHOUT Gen. 4 features.
Gen 4
Gen 4 ONLY
Any combination of
Models 1A, 2A
Must be OFF
(factory default)
Does NOT include Gen. 4 features. System will not
operate if DIP Switch No. 3 is ON, and an error code will
be generated.
Gen 4
Any combination of
Gen 2 and Gen 4
Model 2A ONLY
Must be OFF
(factory default)
Gen 4
Any combination of
Gen 2 and Gen 4
Any combination of
Models 1A, 2A
Must be OFF
(factory default)
Gen 2
Any combination of
Gen 2 and Gen 4
Any combination of
Models 0A****, 1A, 2A
N/A***
Does not include Gen. 4 features.
Figure 56: Location and Setting of ODU DIP Switch 3
1 2
7
6
5
4
3
1 2
7
6
5
4
3
ON
OFF
1 2
7
6
5
4
3
1 2
7
6
5
4
3
ON
OFF
Air/Water Source Unit DIP Switch No. 3
Table 11: System Component Combinations and Operation Status
*Gen 4 Air / Water Source Units = Multi V IV or Multi V Water IV with Gen 4 software (see table below for Gen 4 serial numbers) or Multi V S.
Gen 2 Air / Water Source Units = Multi V II, Multi V III, Multi V IV without Gen. 4 software, Multi V Water II, Multi V Water IV without Gen. 4
software, Multi V Mini, Multi V Water Mini, or Multi V Space II.
**Gen 4 Indoor Units model numbers end in “4”; Gen 2 Indoor Units model numbers end in “2” or an “A”, including Hydro Kit.
***DIP Switch No. 3 on Gen 2 air/water source units is not related to Gen 4 features as it is with Gen 4 air/water source units.
****0A Model Heat Recovery units are not for use with Multi V IV, Multi V Water IV, or Multi V III heat recovery systems.
Air / Water Source Unit
Model Type
Multi V IV Air Source
Heat Pump
Multi V Air Source
Heat Recovery
Multi V IV Water Source
Heat Pump
Multi V IV Water Source
Heat Recovery
Serial Number of Air / Water
Source Units with
Gen 4 Software
502********* and Higher
503********* and Higher
504********* and Higher
Table 12: Serial Numbers of Air / Water Source Units with Gen 4 Software
DIP Switch Settings for Gen4 Equipment
WIRING