Midea MTA-76C(H)RN1 Technical Manual page 144

Midea R410A T3 Top-discharge Split Type Series 50Hz
controller is a master, and the air conditioner is a slave. In the LAN composed of computer
and centralized controller, the computer or gateway is a master, and the centralized
controller is a slave.

The schematic diagram of network control system composition of air conditioner:
2) Keywords and general function description:

Power on or reset:
When the centralized controller is powered on or reset, all display segments of the LCD are
luminous for 2 seconds and then goes off. 1 second later, the system enters the normal
display status. The centralized controller is in the main page display status and displays the
first page, and searches the in-service air conditioners in the network. Once the search is
finished, the centralized controller enters the mode setting page, and sets the first in-service
air conditioner by default.

Network area address of centralized controller:
The local computer or gateway can be connected with 16 centralized controllers for
communication. Each centralized controller serves as an area of the air conditioner network.
The centralized controllers are differentiated by bit selection address. The configurable
range is 0~15.

State indication:
If any local keypad operation is setting the operation status of the air conditioner, the
indicator is on when the signals are sent. Upon completion of the setting process, the
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MCAC-UTSM-201501