Midea MGB-F30W/RN1

Air-cooled modular chiller unit 50Hz MCAC-ATSM-2011-12
148
20
PUMP
Attention: the control port value of the pump actually detected is ON/OFF but not 220V 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.
21
Compressor of the system B;
Neutral line
Four-way valve of the system B;
Neutral line
22
LED display.
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.
23
Compressor of the system A;
Neutral line
Four-way valve of the system A;
Neutral line
24 Outdoor fan A, controlled by T4.
25 Outdoor fan B, controlled by T4.
26 (reserved port)
27 Input of transformer, 220V AC current. (only valid for the main unit)
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 120
o
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
1. 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.
2. 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.