Midea ATOM B Series - Page 53

Atom B Series VRF 50/60Hz
52
Midea
Atom B
Series
Service Manual
Switch
Switch positions
Description
S1
S1-2 is ON, forced clearing of IDU address
S1-2 is OFF, Automatic addressing(default)
 Press indoor unit’s receiver button for 5 seconds, the indoor unit’s communication address code is displayed.
Table 6-2.1: Communication address code
Director light
Running
Timer
Fan/defend cold fan
Warning
Code
8
4
2
1
 Press it for 10 seconds, power code is displayed. Check each unit's address code.
Table 6-2.2: Power code
Address
0
1
2
3
4
5
6
7
8
9
Capacity (×100W)
22
28
36
45
56
71
80
90
112
140
HP
0.8
1.0
1.2
1.6
2.0
2.5
3.0
3.2
4.0
5.0
For example:
Press the button for 5 seconds:
If the “running” and “warning” lights are normally on, that means the address code is 9=(8＋1)
If the lights are blink, the address code should plus 16, so the address code is 25=16＋(8＋1)
Press the button for 10 seconds:
If the “timer” and “warning” lights are normally on, that means the capacity code is 5=(4＋1) and the capacity of indoor unit
is 71×100W(2.5HP).
 If the signal is weak, connect a 120Ω resistor between P and Q of the farthest indoor unit, or connect a 0.5-1.5uF capacitor
between P and Q of outdoor unit. Installation refers to Figure 6-2.1:
Figure 6-2.1: Indoor unit installation
Notes:
1. Communication wires should be shield wire and indoor units should be connected in series.