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5
External boards connection (limited to outdoor unit and system configuration)
The external boards are connection module outside the main control board, including Switch module, 1#
Expansion board and 2# Expansion board.
①
Connection of Display Box
The display box is connected to the main control board through a 4-core cable, and is connected to the
"CN30" socket of the main control board, as shown in the following figure:
CN30
Main
control
board
Display box
①
Switch module connection
Expansion boards can communicate with the main control board through the Switch board. Use one or both
of the two expansion boards.The wiring figures are as follows:
Use 1# Expansion board
Use 2# Expansion board
CN18
CN1
CN2
CN1
CN10
+12V GND E1 E2
1# Expansion board
Main
control
board
Switch
module
CN18
CN1
CN2
CN10
CN1
+12V GND E1 E2
2# Expansion board
Switch
module
Main
control
board
Use 1# and 2# Expansion boards
CN18
CN1
CN2
CN1
CN10
+12V GND E1 E2
CN1
CN10
+12V GND E1 E2
1# Expansion board
2# Expansion board
Switch
module
Main
control
board
NOTE
For the function introduction of the Switch module, 1# Expansion boards and 2# Expansion boards,
please refer to the function module manual.
