Midea MGB-F65W/RN1

MCAC-ATSM-2011-12 Air-cooled modular chiller unit 50Hz
157
Four-way valve of the system B of No.1 unit;
Neutral line
48 No.1 unit outdoor fan B, controlled by T41
49
Compressor of the system A of No.1 unit;
Neutral line
Four-way valve of the system A of No.1 unit;
Neutral line
50 No.1 unit outdoor fan A, controlled by T41
51
1) No.1 unit auxiliary electric heater(only the main unit is valid)
Attention: the control port value of auxiliary electric heater actually detected is ON/OFF but not 220-230V control power supply,
so special attention should be paid when installing the auxiliary electric heater.
Attention!
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.
52
No.1 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.
53 (reserved)
54 (reserved)
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.