Midea Aqua Tempto Power Series, Manual

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MCAC-ATSM-2014-09 Aqua tempo power series tropical air-cooled scroll chiller 50Hz
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will display the error code E8), three temp. areas protections will be conducted: Safety Area, Yellow Area and Red
Area. In case of DLT temp. lower than 125
℃
, there is no protection will perform; in case of DLT higher than 125
℃
, after
10 minutes continual operation, it will enter to Yellow Area, the capacity output from the digital compressor will
decrease to 40%, once the temp. reduce to 100
℃
, it will go back to the Safety Area, and compressor stop down, error
be released, system will restart after 3 minutes .
13
Water inlet temp sensorT62 (TBH2) (fault code EF)
14
Frost-proof sensorT61 (TBH1) (fault code Eb)
15
Water flow detection (fault code of the main unit E0) is only valid for the main unit but invalid for subordinate units.
1) Main unit: if abnormal water flow occurs for the first and second time, the main unit board will display fault code E9. If
abnormal water flow occurs the third time, the main unit board will display fault code E0 (off-power recovery is needed),
and the wired controller will display fault code E0 (fault is displayed only after 3 detection).
2) Subordinate unit: (Joint this terminal with short-connective wires
，
water flow detection will not be done).
16
Electronic expansion valve of the system B
17
Electronic expansion valve of the system A
Electronic expansion valve is used to control refrigerant flow under different operating modes and different loads.
18
Auxiliary electric heater
Attention: the control port value of auxiliary electric heater actually detected is ON/OFF but not 220-240V control power
supply, so special attention should be paid when installing the auxiliary electric heater.
Attention!
Under heating mode, when the main unit board detects total water outlet temp. to be lower than 45
℃
, the switch will be
closed, and the auxiliary electric heater will begin to work; when the total water outlet temp. is higher than 50
℃
, the
switch will be opened, and the auxiliary electric heater will stop working.
19
PUMP.
Attention: the control port value of the pump actually detected is ON/OFF but not 220-240V control power supply, so
special attention should be paid when installing the pump.
1) After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state always in the
process of operation.
2) In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop operating.
3) In case of shutdown under the pump mode, the pump can be directly shut down.
20
Compressor of the system B;
Zero line;
Four-way valve of the system B;
Zero line.
21
Digital pipe.
1) In case of stand-by, the address of the module is displayed;
2) In case of normal operation, 10. is displayed (10 is followed by dot).
3) In case of fault or protection, fault code or protection code is displayed.
22
Compressor of the system A;
Zero line;
Four-way valve of the system A;
Zero line.
23
Outdoor fan high wind , controlled by T4.
24
Outdoor fan low wind, controlled by T4.
25
PMW , For the main unit's ability to adjust the digital compressor .( Only the digital modular is valid)
26
Input of transformer, 220-240V AC current. (only valid for the main unit)
27
Input of three-phase four-wire power supply (fault code E1)
Three phases L1, L2 and L3 of power supply should exist simultaneously, and the difference of phase angle should be
120º among them. If the conditions are not met, fault of phase sequence or phase lack may occur, and fault code will be
displayed. When the power supply returns to normal condition, fault is removed. Attention: phase lace and phase
dislocation of power supply are detected only in the early period after the power supply is connected, and they are not
detected while the unit is in operation.
In case of phase sequence error, please switchover to the two of L1, L2 orL3 power cable.
28
Output of transformer
29
ON/OFF control interface
Faults
When the main unit suffers faults, the main unit stops operating, and all other units also stop running. When
the subordinate unit suffers faults, only the unit stops operating, and other units are not affected.
Protection
When the main unit is under protection, only the unit stops operating, and other units keep running.
When the subordinate unit is under protection, only the unit stops operating, and other units are not affected.
.