LG ARND203DCR4 User Manual

Due to our policy of continuous product innovation, some specifications may change without notification.
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LG Control Board Layout
Figure40: Main Module
Drawing
Reference
Terminal
Unit Connection
Type
Position Indicates
Range
2
CH1
CAREL J4 Field Bus Connector
(For Communication with CAREL)
RS485
CH2
RS 485 communication with other Module’s CH1
RS485
CH3
CEN_Bus A&B (To Outdoor Unit)
RS485
CH4
BMS_Bus A&B
RS485
3
UI1
Unassigned
0 – 10Vdc
UI2
Outdoor Air Humidity
0 – 10Vdc
0~100%
UI3
Supply Air Temperature (Field Option)
0 – 10Vdc
-130-210F
UI4
Supply Air Relative Humidity (Field Option)
0 – 10Vdc
0~100%
UI5
Differential Pressure Sensor
(For SA flow rate monitoring & CFM Modulation)
0 – 10Vdc
0-30”wc
UI6
Unassigned
UI7
Unassigned
UI8
Space CO2 Sensor(Field Option)
0 – 10Vdc
0-3000ppm
4
DI1
Forced Stop
NC (Open = Unit Stop)
DI2
Unit On / Off
NO (Closed = Unit On)
DI3
Float Switch
NC (Open = Unit Stop)
5
AO1
Unassigned
AO2
Unassigned
AO3
Unassigned
AO4
Unassigned
AO5
Heater (Filed Option)
0 – 10Vdc
AO6
Unassigned
6
DO1
DO1-COM Error status
C type
NO (Closed = Alarm)
(C) - COM
NC (Open = Alarm)
DO2
On / Off Status
NO (Closed= Unit On
1)
)
DO3
Unassigned
DO4
Drain Pump
NO (Closed= Pump on)
DO5
Main Coil Bypass Valve
NO (Closed= Valve open)
Open/Close
DO6
Solenoid Valve (Reheat Coil)
NO (Closed= Valve open)
Open/Close
Note:
1) If fan is running, it indicates as Unit on
46

LG ARND203DCR4 Specifications

General

Brand	LG
Model	ARND203DCR4
Category	Air Conditioner
Language	English