a. The array of the liquid crystal display is composed of 4X16 grids, and each grid is 
composed of two blocks of different sizes (as shown in the above figure). The 
status indication table is as follows: 
b. The array includes horizontal coordinates 00-15 on the up side and vertical 
coordinates 00+, 16+, 32+ and 48+ on the left side, which indicate the address of 
the indoor unit. The sum the horizontal coordinate and the vertical coordinate 
composes the grid the address of the grid. Each grid corresponds to an indoor unit 
of this address. 
Status 
Object 
 
Constantly on  Slow blink Fast blink Not bright 
Big black 
block 
Small black 
block 
In-service  Selected 
Out of 
service 
 
Fault of 
indoor/ 
outdoor 
unit 
Power 
off 
Power on 
2. LCD display description 
    1) Description of the main page
Fig 2.5 The example diagram of the main page 
Installation & Owner‘s Manual 
          ①The LCD displays the main page, 60 air conditioners are in service, which 28 are 
    powered on and 32 off. 
          ②The address of the air conditioners is sum of the coordinates. For example, the 
   address of (48+,09) is 48+09=57. 
          ③In the array, the big dots from (16+,00) to (32+,15)  are luminous, and the small dots 
   are not luminous. It indicates the 32 air conditioners with the addresses from 16 to 47 are 
   powered off. 
          ④In the array, the big and small dots from (48+,09) to (48+,12) are not luminous. It 
  indicates the four air conditioners with the addresses from 57 to 60 are outside. 
          ⑤All other big and small dots in the array are luminous. It indicates all other air 
  conditioners are in the net powered on. 
          ⑥The centralized controller  communicates with the computer normally,when the 
  keypad of the centralized controller  is locked.