Do Wring Concept - LG PRDCA0 Installation Manual

DO Wring concept

Output
Wiring
No.
Open
Operation
DO 01-4
On
Compressor
DO 01-2
is Off
DO 23-4
Cooling / Heating
Defrosting / FAN
DO 23-2
DO 45-4
Low FAN
DO 45-2
DO 67-4 No Error
!
NOTE
If AHU should have High/Mid/Low fan mode, Fan control in AHU should utilize DO 45-4 /45-2
(Non-Voltage Contact).
AHU KIT WIRING CONFIGURATION WITH DDC
Digital Output(7ch)
Short
-. When DI 01-3 is short, ODU and FAN are On.
Operation
Off
-. When DI 01-3 is open, ODU and FAN are Off.
-. When ODU compressor is running, it is short.
Compressor
is On
-. When ODU compressor is off, it is open
-. 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.
-. When DO 45-4 / DO 45-2 are open, it is low fan mode.
Mid FAN
-. When DO 45-4 is short and DO 45-2 is open , it is mid
fan mode.
-. When DO 45-2 is short, it is high fan mode (DO 45-4 is
High FAN
neglected).
Error -. When DO 67-4 is short, ODU has error and ODU stops
Occurred FAN is Off.
DO Specification
: AC 250V, DC 30V, 1A
Logic
25