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Multi V Ducted Indoor Units
Due to our policy of continuous product innovation, some specifications may change without notification.
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WIRING
DIP Switch Settings for Gen4 Equipment
Generation 4 Equipment
The latest versions of LG’s indoor units 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.
Figure 41 shows the ODU DIP switch. Table 19 lists how combining
different components will affect system operation. Table 20 lists the
serial numbers of air and water source units that have Gen 4 soft-
ware. 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 41: 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
ODU/WSU DIP Switch No. 3
Table 19: 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 20: Serial Numbers of Air/Water Source Units with Gen 4 Software
