Midea Aqua Tempto Power Series, Manual

Page: 109 / 213

MCAC-ATSM-2014-09 Aqua tempo power series tropical air-cooled scroll chiller 50Hz
107
7
Spot check. The operating status of outdoor system can be observed through spot check, and specific display contents are
as shown in the following figure:
Normal display
Operating mode Operating capability of the compressor B Number of online units Outdoor ambient temp. Temp. of the condenser A
T61 frost-proof temp Unit outlet water temp Unit outlet-water tempe Temp. of the condenser B
TXV opening A TXV opening B Operating current of system A Operating current of system B
The last failure
●
Display contents of “operating mode”: 1. cooling; 2. heating; 4. pump; 8. Stand-by
● Display contents of “number of online units”: the main unit can display the number of online units, and the subordinate unit
displays 0.
8
Factory setting
9
10
COM (O) 485 communication port (fault code E2)
11
COM (I) 485 communication port (fault code E2)
COM (O) is interconnected with P, Q and E of COM (I), used for RS-485 communication.
1) If faults occur between the wired controller and the main unit module, all modules will be shut down.
2) If faults occur between the main unit and subordinate units, the subordinate unit module suffering communication fault will
be shut down. Less units will be detected by the wired controller, which may display EA, and in the meanwhile, the indicator
lamp of the wired controller will flash.
Restart 3 minutes later after malfunction be removed.
12
High-pressure protection of the system A and discharge temp. switch protection (protection code P0);
High-pressure protection of the system B and discharge temp. switch protection (protection code P2);
Low-pressure protection of the system A (protection code P1);
Low-pressure protection of the system B (protection code P3);
Constant speed compressor: connection of discharge temp. switch and high-pressure switch of the system in series.
13
Inlet water temp. sensor (fault code EF)
14
Shell and tube low-temp. ant-freeze sensor (fault code Eb)
15
Water flow detection (fault code of the main unit E9) is only valid for the main unit but invalid for subordinate units.
1) Main unit: if abnormal water flow occurs , the main unit board and the wired controller will display fault code E9.
2) Subordinate unit: (water flow detection will not be done).
16
Power phase detection(fault code E8)
17
Electronic expansion valve of the system B
18
Electronic expansion valve of the system A
Electronic expansion valve is used to control refrigerant flow under different operating modes and different loads.
Each unit has the same electric control function, and the
main unit and subordinate units can be set through
address code on the electric control board. The address
code 0 # is provided as the main unit. The priority of being
the main unit is given to the unit with digital compressor,
and other addresses are subordinate units. Only the unit is
chosen as the main unit, its electric control can activate
such functions as direct communication with the wired
controller, refrigerating and heating capability adjustment,
pump control, auxiliary electric heater control, total effluent
temp. detection and water flow switch detection.
When the address is 0,
it serves as the main
unit.
When the address is
1,2,3……F, it serves as
the subordinate unit
1,2,3……15.
8
9
A
B
C
D
E
F
8
7
6
5
4
3
2
1
0
0 1
2
3
4
5
6
7
8
F
E
D
C
B
A
9
8
ADDRRSS