Midea ATOM B Series Service Manual page 53

Atom B Series VRF 50/60Hz
Switch
S1
 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
Code
 Press it for 10 seconds, power code is displayed. Check each unit's address code.
Table 6-2.2: Power code
Address
Capacity (×100W)
HP
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.
52
Switch positions
S1-2 is ON, forced clearing of IDU address
S1-2 is OFF, Automatic addressing(default)
Running
8
0 1 2
22 28 36
0.8 1.0 1.2
Description
Timer Fan/defend cold fan
4
3 4 5
45 56 71
1.6 2.0 2.5
Warning
2 1
6 7 8
80 90 112
3.0 3.2 4.0
9
140
5.0