14
Technical Information
U-Match Series DC Inverter Service Manual
44
Figure 2-7-11
Notes:
In order to realize the MODBUS interface function, the address mode of the unit must be set
into long-distance control address mode; you can not set it into centralized control address
mode, otherwise, this function can not be realized;
The unit can not be connected to MODBUS and centralized controller at the same time; only
one of them can be selected;
255 sets of unit in maximum can be connected in the same network; the unit addresses in the
same network must be different, otherwise, the unit control will be affected;
Perform wiring when the unit power is cut off.
7.2.4 Connect to interface of centralized controller:
The indoor unit is with the interface of centralized controller. When centralized controller is connected,
centralized control of unit can be realized when the wired controller is not connected;
(1) Interface instruction:
1)
The printing is COM-BMS2, COM-BMS3 and the interface type is B2B-XH-K3;
2)
Electrical characteristic: none;
3)
Working principle: centralized control the communication of indoor main board and realize the
unit control;
(2) Function instructions:
Notes:
In order to realize the MODBUS interface function, the address mode of the unit must be set into long-distance control
address mode; you can not set it into centralized control address mode, otherwise, this function can not be realized;
1. The unit can not be connected to MODBUS and centralized controller at the same time; only one of them can be
selected;
2. 255 sets of unit in maximum can be connected in the same network; the unit addresses in the same network must be
different, otherwise, the unit control will be affected;
3. Perform wiring when the unit power is cut off.
7.2.4 Connect to interface of centralized controller:
The indoor unit is with the interface of centralized controller. When centralized controller is connected, centralized control of
unit can be realized when the wired controller is not connected;
1. Interface instruction:
a. The printing is COM-BMS2, COM-BMS3 and the interface type is B2B-XH-K3;
b. Electrical characteristic: none;
c. Working principle: centralized control the communication of indoor main board and realize the unit control;
2. Function instructions:
In order to achieve this function, set the address mode and address through wired controller. Please refer to Point
3 for the setting method. The address mode is defaulted to be connecting to centralized controller mode and the
defaulted address is 1;
When the centralized controller is connected, centralized control of the unit can be realized to control unit ON/OFF,
operation mode, set fan speed/temperature and weekly timer.
3. Setting method:
Firstly, set the address mode of wired controller into centralized controller address mode. The setting method is:
a. Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the debugging menu.
Press Mode button to adjust to “10” in temperature displaying zone. Timer zone displays setting state and press
or
button to adjust. There are 2 selections:
i. Centralized controller address mode (LCD displays 00)
ii. Long-distance control address mode (LCD displays 01)
