10
PRDCAM
AHU Communication Kit 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.
Communication Module
Main Module
The default setting of all DIP switches is “off”
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SW1
1
Control Type
On
Communication Controlled by DDC through Modbus or LG centralized controller
Off
Contact signal
Controlled by DDC through Contact signal AI and DI
LG Centralized controller can only monitor status
2
Discharge Temp.
Control Type
On
Stand alone
Discharge temp. control by LG controller using own discharge
temp. sensor
Off Manual by DDC
Discharge temp. control by DDC using filed supplied discharge
temp. sensor
3
Defrost Operation
Type¹
On
Normal
In case of multiple outdoor units, Defrost operation can be oper-
ated simultaneously
Off
Sequential
Start up
In case of multiple outdoor units, the outdoor unit is sequentially
started at intervals of 10 minutes
4
Central
Communication
Type
On LG Central Comm Modbus Communication
Off
-
Not Used
SW2
1
ODU Capacity
Control
On
ODU Capacity
Setting #2
ODU capacity control #2
Off
ODU Capacity
Setting #1
ODU capacity control #1
-
-
-
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2
-
-
-
d
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vr
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s
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3
-
-
-
d
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vr
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s
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R
4
SW3
-
-
-
d
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vr
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s
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R
1
-
-
-
d
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vr
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s
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R
2
-
-
-
d
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vr
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s
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R
3
-
-
-
d
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vr
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s
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R
4
SW4
-
-
-
d
e
vr
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s
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R
1
-
-
-
d
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vr
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s
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R
2
-
-
-
d
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vr
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s
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R
3
-
-
-
d
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vr
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s
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R
4
Note:
1. Function of defrost operation type can be applied only to Multi V outdoor units (after MULTI V 5 model).
Figure 3: Main Module DIP Switches.
Table 4: Main Module DIP Switch Settings
AHU COMMUNICATIONS KIT INSTALLATION
DIP Switch Settings
