Mars Comfort-Aire Century VCD-SA Series Service Manual page 102

For some models: The wired controller connects to terminal board, terminal board connects to main control board.
2) Address setting
a. One non-polarity controller can control up to 16 indoor units.
b. When the non-polarity controller is connected to several units, every air-conditioner in network has only one
network address to distinguish each other.
c. Address code of air-conditioner in LAN is set by code switch ENC1(Duct and Ceiling& Floor) or ADSS(Cassette)
of the indoor unit, and the set range is 0-15.
d. Note: The indoor units are controlled at the same time, not independently. The purpose of setting network
address is identify the unit when error occurs.
Putty
Note: DO NOT allow water to enter the remote control. Use the trap and putty to seal the wires.
Terminal board
CN2
ENC1
HA HB
HA HB
Wired controller
Unit1
HA HB
HA HB
Wired controller
Trap
 Product Features
Main control board
4
4
CN40
Unit2
HA HB
Putty
Trap
10 
Service Manual - VCDxxSA
Unit16
HA HB
Putty
Trap
c