Midea MGB-F65W/RN1

Air-cooled modular chiller unit 50Hz MCAC-ATSM-2011-12
156
2)Under heating mode, when the main unit board detects total water outlet temperature to be lower than 45 C, the switch will
be closed, and the auxiliary electric heater will begin to work; when the total water outlet temperature is higher than 50 C, the
switch will be opened, and the auxiliary electric heater will stop working.
38
No.2 unit pump (only the main unit is valid)
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 after 2 minutes after all modules stop operating.
3) In case of shutdown under the pump mode, the pump can be directly shut down.
39
Compressor of the system B of No.2 unit;
Neutral line
Four-way valve of the system B of No.2 unit;
Neutral line
40 No.2 unit outdoor fan B, controlled by T42
41
Compressor of the system A of No.2 unit;
Neutral line
Four-way valve of the system A of No.2 unit;
Neutral line
42 No.2 unit outdoor fan A, controlled by T42
43
No.1 unit ADDRESS1 address code
Each modular part of modular unit has the same electric control function, and the main unit and slave 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 slave 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 temperature detection and water flow switch
detection.
44
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.
45 No.1Transformer output,220-230V AC
46 No.2Transformer output,220-230V AC
47
Compressor of the system B of No.1 unit;
Neutral line