Gree GUD71PHS1/A-S - Page 28

GREE U-Match 6 SERIES UNIT SERVICE MANUAL
25
displaying zone. Timer zone displays setting state and press “
＋
” or “
－
” button to adjust. There are 2
selections:
Mode 1 (LCD displays 00).
Mode 2 (LCD displays 01).
Press “ENTER” button to finish setting.
Note:
Blowing residual heating of indoor unit.
Mode 1: Unit stops when reaching temperature point and indoor fan motor does not stop in cooling
mode; After unit stops when reaching temperature point in heating mode, duct type unit and floor ceiling
unit blow residual heat for 60s and then stop indoor unit, while cassette type unit always operates in low
fan speed and blows residual heat for 60s when there is malfunction. After the residual heat blowing from
the fan stops, if the start-up condition is not met within 15 minutes, the indoor unit fan starts to run the 60S
in low fan speed, if the start-up condition is met in this process, it will immediately enter the heating mode;
if the test results still do not meet the start-up conditions, then after blowing for 60s, start timing for 15
minutes and cycle this process.
Mode 2: After unit stops when reaching temperature point, the indoor fan motor stops operation with
a 10s-delay no matter in cooling mode or in heating mode.
2.3.14 Connect to Interface of Centralized Controller
The indoor unit is with the interface of centralized controller. When centralized controller is connected,
centralized controller of unit can be realized when the wired controller is not connected.
(1) Interface instruction:
1) The printing of interface on the indoor unit PCB is COM_BMS, before connecting the
centralized controller, a gateway model ME50-00/EG(M) is required. The following figure
shows an example.
2) Electrical characteristic: none.
3) Working principle: centralized controller the communication of indoor mainboard and realize
the unit control.