HTW MI2 Serie Manuel D'installation page 45

The X1, X2, D1, D2 ports on the sides of the main control board and the

unidirectional communication port (display board side) are for different
types of wired controllers (see Figure 7.10).
Use the connecting wires (accessory 8) to connect the D1, D2 ports.

A
Wired
B
C
controller
D
Display
XS4 XP4
D1 D2
To wired
controller
comm. bus
XT2 P Q E X1 X2
To outdoor/indoor To wired
units comm. bus controller
comm. bus
Caution
•
For the specific connection method, refer to the instructions in the
corresponding wired controller manual to carry out the wiring and
connections.
7.4 Handling the Electrical Wiring Connection Points
Once the wiring and connections are done, use tie straps to secure the

wiring properly so that the connection joint cannot be pulled apart by
external force. The connection wiring must be straight out so that the
cover of the electrical box is level and can be closed tightly.
Use professional insulation and sealing materials to seal and protect the

perforated wires. Poor sealing may lead to condensation, and entry of
small animals and insects that may cause short circuits in parts of the
electrical system, causing the system to fail.
8. On-site Configuration
8.1 Capacity Settings
Set up the PCB DIP switch on the indoor electric control box to cater to different
uses. Once the settings are done, make sure you cut off the main power switch
again, and then switch the power on. If the power is not cut off and switched on
again, the settings will not be executed.
POWER_S
ENC1
ENC1 Settings for Capacity DIP Switch:
SW7
ENC1
+
Toggle Set cooling
Toggle
switch capacity
switch
Dial code Cooling capacity Dial code Cooling capacity
*
0 2200W
8
*
9
1 2800W
*
2 3600W
A
*
3 4500W
B
*
C
4 5600W
5 7100W D
6 8000W E
7 9000W F
*
Reserved
Caution
• The capacity DIP switches have been configured before delivery. Only
a professional maintenance personnel should change these settings.
SW5 SW4 SW3 SW2 SW1
SW6 SW7
ENC1
1
Main Board
Figure 7.10
+
SW7
SW7
ENC1
+
Set cooling Toggle Set cooling
capacity switch capacity
Dial code Cooling capacity
*
0 28000W
10000W
11200W
1 33500W
*
2 40000W
12500W
3 45000W
14000W
16000W 4 56000W
*
18000W
20000W
25000W
8.2 Address Settings
When this indoor unit is connected to the outdoor unit, the outdoor unit
will automatically allocate the address to the indoor unit. Alternatively, you
may use the controller to manually set the address.
The addresses of any two indoor units in the same system cannot be
the same.
The network address and the indoor unit address are the same, and
does not have to be configured separately.
Once the address settings are completed, mark the address of each
indoor unit to facilitate after-sales maintenance.
The centralized control of the indoor unit is completed on the outdoor
unit. For details, refer to the manual on the outdoor unit.
Caution
• Once the centralized control function for the indoor unit has been
completed on the outdoor unit, the DIP switch on main control panel of
the outdoor unit must be set to auto addressing; otherwise, the indoor
unit in the system are not controlled by the centralized controller.
• The system can connect up to 64 indoor units (address 0~63) at the
same time. Each indoor unit can only have one address DIP switch in the
system. The addresses of any two indoor units in the same system
cannot be the same. Units that have the same address may malfunction.
8.3 DIP Switch Settings on Main Board
SW1_1
SW1
Cooling mode temperature compensation is 0°C
[ ]
0
SW1
Cooling mode temperature compensation is 2°C
[ ]
1
SW1_2
SW1
EEV at position 96 (steps) in standby in heating mode
[ ]
0
SW1
EEV at position 72 (steps) in standby in heating mode
[ ]
1
SW2
SW2
External static pressure 1
[ ]
00
SW2
External static pressure 2
[ ]
01
SW2 External static pressure 3
[ ]
10
SW2
External static pressure 4
[ ]
11
Note:
Capacity ESP1
7.1-16.0kW 100Pa
20.0-28.0kW 170Pa
40.0-56.0kW 300Pa
*
SW3_1
SW3
Reserved
[ ]
0
SW3
Clear indoor unit address
[ ]
1
SW3_2
SW3
Reserved
[ ]
0
16
ESP2 ESP3 ESP4
50Pa 170Pa 200Pa
100Pa 200Pa 250Pa
100Pa 200Pa 400Pa