LG PRDCA0 - DO Wring Concept

AHU KIT WIRING CONFIGURATION WITH DDC
25
ENGLISH
Digital Output(7ch)
NOTE
!
If AHU should have High/Mid/Low fan mode, Fan control in AHU should utilize DO 45-4 /45-2
(Non-Voltage Contact).
Wiring
No.
Output
Logic
Open Short
DO 01-4
Operation
On
Operation
Off
-. When DI 01-3 is short, ODU and FAN are On.
-. When DI 01-3 is open, ODU and FAN are Off.
DO 01-2
Compressor
is Off
Compressor
is On
-. When ODU compressor is running, it is short.
-. When ODU compressor is off, it is open
DO 23-4
Cooling / Heating
Defrosting / FAN
-. When DO 23-4 / 23-2 are open, it is ventilation mode.
-. When DO 23-4 is open, DO 23-2 is short, it is defrosting
during heating. FAN can be OFF if PIPE_IN and
PIPE_OUT are less than 20°C.
-. When DO 23-4 is short, DO 23-2 is open, it is cooling.
-. When DO 23-4 is short, DO 23-2 is short, it is heating
-. Defrosting mode only works when it is connected with
ODU.
DO 23-2
DO 45-4
Low FAN
Mid FAN
-. When DO 45-4 / DO 45-2 are open, it is low fan mode.
-. When DO 45-4 is short and DO 45-2 is open , it is mid
fan mode.
DO 45-2 High FAN
-. When DO 45-2 is short, it is high fan mode (DO 45-4 is
neglected).
DO 67-4 No Error
Error
Occurred
-. When DO 67-4 is short, ODU has error and ODU stops
FAN is Off.
DO Specification
: AC 250V, DC 30V, 1A
DO Wring concept