Midea Aqua Tempo Super MC-SP25-RN1L, Technical & Service Manual

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MCAC-ATSM-201606 Aqua Tempo Super Series air cooled scroll chiller unit (50Hz)
120
28
Input of three-phase four-wire power supply (Fault code E1)
Three phases A, B and C 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.
29 Output of transformer
30 Power port for the current board
31
One compressor of system B(B2); Neutral wire;
One compressor of system A(A2) ; Neutral wire.
32 The alarm signal output of the unit(ON/OFF signal)
33
Anti-freezing pressure protection of system A(Protection code Pc)
Anti-freezing pressure protection of system B(Protection code Pd)
34
Remote control port(ON/OFF signal, effect on NO.0 unit)
1.Dial the code S7 in the main control board to the
“
ON
”
position and enter to the remote control mode (the wired controller
is invalid).
2.If the port is closed, the unit is turned on, else, the unit is turned off.
35
Remote mode control port(ON/OFF signal, effect on NO.0 unit)
1.Dial the code S7 in the main control board to the
“
ON
”
position and enter to the remote control mode (the wired controller
is invalid).
2.First,the ON/OFF port is closed. Second, if this port is closed, the unit enters the heating mode, else ,the unit enters the
cooling mode.
36 Four-way valve of system A; Neutral wire.
37 Detection of current of compressor B2 (Protection code P5)
38 Plate heat exchanger heater/Pump heater port(DC 12V signal).
CAUTION
1. Faults
When the main unit suffers faults, the main unit stops operating, and all other units also stop running;
When the slave unit suffers faults, only the unit stops operating, and other units are not affected.
2. Protection
When the main unit is under protection, only the unit stops operating, and other units keep running;
When the slave unit is under protection, only the unit stops operating, and other units are not affected.