Lg Control Board Layout - LG ARND DCR4 Series Installation Manual

LG Control Board Layout

Main Module
Figure 77: Main Module.
Table 40: Main Module Component Details.
Drawing
Terminal
Reference
CH1 CAREL J4 Field Bus Connector (For Communication with CAREL)
CH2
2
CH3
CH4
UI1
UI2
UI3
UI4
3
Differential Pressure Sensor (For SA flow rate monitoring and CFM
UI5
UI6
UI7
UI8
DI1
4 DI2
DI3
AO1
AO2
AO3
5
AO4
AO5
AO6
DO1
DO2
6 DO3
DO4
DO5
DO6
If the fan is operating, it indicates as Unit ON.
1
Unit Connection
RS-485 communication with other Module's CH1
CEN_Bus A&B (To Outdoor Unit)
BMS_Bus A&B (To Outdoor Unit)
Unassigned
Outdoor Air Humidity
Supply Air Temperature (Field Option)
Supply Air Relative Humidity (Field Option)
Modulation)
Unassigned
Unassigned
Space CO Sensor (Field Option)
2
Forced Stop
Unit On / Off
Float Switch
OA Damper (Field Option)
Unassigned
RA Damper (Field Option)
Unassigned
Unassigned
Heater Output Signal (Field Option)
DO1-COM Error Status
(C) - COM
On / Off Status
Heater Enable Signal (Field Option)
Drain Pump
Main Coil Bypass Valve
Solenoid Valve (Reheat Coil)
Due to our policy of continuous product innovation, some specifications may change without notification.
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CONTROLLER
LG Control Board Layout
Type Position Indicates
RS-485
RS-485
RS-485
RS-485
0 – 10Vdc
0 – 10Vdc
0 – 10Vdc
0 – 10Vdc
0 – 10Vdc
0 – 10Vdc
NC (Open = Unit Stop)
NO (Closed = Unit On)
NC (Open = Unit Stop)
0-10Vdc
0-10Vdc
0-10Vdc
NO (Closed = Alarm)
C type NC (Open = Alarm)
NO (Closed= Unit On
NO (Closed: Enable
Signal On)
NO (Closed= Pump On)
NO (Closed= Valve Open) Open/Close
NO (Closed= Valve Open) Open/Close
Range
0~100%
-130-210°F
0~100%
0-30"wc
0-3,000ppm
0~100%
0~100%
0~100%
)
1
71