MCAC-ATSM-2014-09 R410a tropical air-cooled scroll chiller unit 60Hz
Control system 85
PUMP.
Attention: the control port value of the pump actually detected is ON/OFF but not 220-230V 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.
Compressor of the system B;
Neutral wire;
Four-way valve of the system B;
Neutral wire.
Numerical code tube.
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.
Compressor of the system A;
Neutral wire;
Four-way valve of the system A;
Neutral wire.
Outdoor fan A, controlled by T4;
Neutral wire;
Outdoor fan B, controlled by T4;
Neutral wire;
Input of transformer, 220-230V AC current. (only valid for the main unit)
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.
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.
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