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Midea MGB-F65W/RN1

Midea MGB-F65W/RN1
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Air-cooled modular chiller unit 50Hz MCAC-ATSM-2011-12
154
8
No.1 unit T41 :outdoor ambient temperature sensor(malfunction code E7)
As long as one system has requirement to run outdoor fan,the unit controller sent the signal to restart outdoor fan.whether the
system runs one fan or two fans is controlled by T41
9 No.1 unit T3-1B :pipe temperature sensor of condenser B (malfunction code E6,protection code P7)
10
No.1 unit T3-1A :pipe temperature sensor of condenser A (malfunction code E5,protection code P6)
1)T3-1A,T3-1B when the electric control of the modular unit detects the temperature of the outdoor pipe T3-1A or T3-1B of
the system exceeds the protective temperature 65 C, the corresponding system will be shut down. And it will be re-started up,
after the temperature drops below the recovery temperature 60 C. Another system will be not affected.
2) T41,T3-1B,T3-1A when the temperature sensor is detected to suffer open circuit or short circuit, fault alarm will occur.
When the main unit suffer fault of temperature sensor: the main unit and slave units will be shut down.
When the slave unit suffer fault of temperature sensor: the unit will be shut down, but other slave units will not be affected.
11
No.1 unit Total outlet water temperature sensor (fault code E3)
Only the main unit is valid, and the slave units are invalid.
Under cooling mode and heating mode, conduct adjustment according to the magnitude of total outlet water temperature.
Auto-load and auto-unload units of the modular.
12 No.1 unit low-temperature ant-freeze sensor TBH1-A
13 No.1 unit Inlet water temperature sensor TBH1-B
14
No.1 unit outlet water temperature sensor (fault code E4)
Under cooling mode and heating mode, conduct adjustment according to the magnitude of unit outlet water temperature.
Adjustment range of constant speed capability: ON and OFF.
15 No.2 unit electronic expansion valve of the system B
16 No.2 unit electronic expansion valve of the system B
17
high-pressure protection and discharge temperature switch protection of the system A of No.2 unit (protection code P0);
high-pressure protection and discharge temperature switch protection of the system B of No.2 unit (protection code P2);
low-pressure protection of the system A of No.2 unit (protection code P1);
low-pressure protection of the system B of No.2 unit (protection code P3);
Constant speed compressor: connection of discharge temperature switch and high-pressure switch of the system in series.
18
Water flow detection of No.2 unit (fault code of the main unit E0) is only valid for the main unit but invalid for subordinate units.
1) Main unit: if abnormal water flow occurs for the first and second time, the main unit board will display fault code E9. If
abnormal water flow occurs the third time, the main unit board will display fault code E0 (off-power recovery is needed), and
the wired controller will display fault code E0 (fault is displayed only after 3 detection).
19
No.2 unit Total outlet water temperature sensor (fault code E3)
Only the main unit is valid, and the slave units are invalid.
Under cooling mode and heating mode, conduct adjustment according to the magnitude of total outlet water temperature.
Auto-load and auto-unload units of the modular.
20 No.2 unit T3-2A :pipe temperature sensor of condenser A (malfunction code E5,protection code P6)
21
No.1 unit T3-2B :pipe temperature sensor of condenser B (malfunction code E6,protection code P7)
1)T3-2A,T3-2B when the electric control of the modular unit detects the temperature of the outdoor pipe T3-2A or T3-2B of
the system exceeds the protective temperature 65 C, the corresponding system will be shut down. And it will be re-started up,
after the temperature drops below the recovery temperature 60 C. Another system will be not affected.
2) T42,T3-2B,T3-2A when the temperature sensor is detected to suffer open circuit or short circuit, fault alarm will occur.
When the main unit suffer fault of temperature sensor: the main unit and slave units will be shut down.
When the slave unit suffer fault of temperature sensor: the unit will be shut down, but other slave units will not be affected.
22
No.2 unit T42 :outdoor ambient temperature sensor(malfunction code E7)
As long as one system has requirement to run outdoor fan,the unit controller sent the signal to restart outdoor fan.whether the
system runs one fan or two fans is controlled by T42
23 (reserved)

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