Midea Aqua Tempto Power Series, Manual

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Aqua tempo power series tropical air-cooled scroll chiller 50Hz MCAC-ATSM-2014-09
90
5
Unit outlet water temp. sensor (fault code E4)
Under cooling mode and heating mode, conduct adjustment according to the magnitude of unit outlet water temp..
6
Total outlet water temp. sensor (fault code E3)
Only the main unit is valid, and the subordinate units are invalid.
Under refrigerating mode and heating mode, conduct adjustment according to the magnitude of total outlet water temp..
Adjustment range: shut-down, 40%, 60%, 80% and 100%.
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
Selection code of the compressor
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);
1) Constant speed compressor: connection of discharge temp. switch and high-pressure switch of the system in series.
2) Digital compressor: With dual-protection from Air Exhaust Temp. Switch and Air Exhaust Temp. Sensor. The Switch
tandem connects with the Hi-pressure switch in the system, while the Sensor enjoys an exclusive connector.
The Air Exhaust Temp. Sensor at Digital Compressor: Air exhaust temp. value (DLT) protects the compressor (Fixed
frequency compressor doesn’t inspect this port). When DLT work in normal (no air exhaust temp. sensor error, if does,
The diagram denotes
selection of digital
compressor
The diagram denotes
selection of constant
speed compressor.
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
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
When the
address is 0, it
serves as the
main unit.