Main Board Code Setting - Delta 21CK018C24 Instruction Manual

Note：
1
Mainboard LED display instruction
Normal Operation
Defrosting
High pressure protection
Low pressure protection
Outdoor ambient Temp.
sensor Malfunction
Defrosting Temp. sensor
Malfunction

5 Main board Code Setting

Please find the corresponding main board according to the unit type and then check whether the mainboard code is
right according to the main board.
The relation between main board type and unit type:
Main board: Z4G25C
Code location and meaning:
Please find the corresponding main board according to the complete unit type and then check whether the main
board code conforms to the figures below according to the main board. Cooling only unit as well as cooling and
heating unit is differentiated by location "4" of DIP switch. When it is dialed to "4", it means cooling and heating
when it is dialed to ON, it means cooling only. The third code remains in "3". Please refer to the following figure for
detailed coding.
Ceiling Type
0
LED1
Flashing every 0.5s
ON
Flashing every 0.5s
OFF
OFF
ON
Z4G25B
Cooling only ：
LED2
Flashing every 0.5s
ON
OFF
Flashing every 0.5s
ON
OFF
Cooling and heating：
25