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Operating Manual | Attachment and Installation Cooling Units | Multi Controller (MC) – 400 / 460 V, 3~ | 086100124 50/76
5 Operation
5.1 General functions
Damage to the unit
Operation without the unit cover prevents sufficient air supply to the condenser and restricts the intended cooling function.
• Only operate the cooling unit with the unit cover in place.
Fig. 23: Electronic control function
The Multi-Controller (MC) has an indicator unit with a green LED light (1).
If an error occurs, the green LED light (1) flashes and various information is displayed in the control panel (5), see "Controller",
Page 16.
• Switch on the power supply to the cooling unit after completing the assembly and installation work.
• The cooling unit (2) starts operation and the LED light (1) of the indicator unit switches to green continuous light. The
units run continuously after applying the supply voltage and closing the door.
– Exception: Energy-saving mode and cooling units with antifreeze option.
– The external temperature sensor controls the energy-saving mode, see section "Energy-saving mode", Page 21.
• The Multimaster function can connect up to six cooling units in the bus function.
• The control panel (5) shows the current operating states.
• The cooling unit (2) is equipped with an electronic controller. A temperature sensor (4) measures the temperature of the
sucked in interior switch cabinet air (3).
• Exceeding or dropping below the lower and upper temperature limit leads to tripping of the fault indication (6).
• The green LED light flashes in the case of a fault indication the control panel (5) shows the error number alternately with
the temperature.
• The ambient conditions and switch cabinet interior temperatures must correspond to the prescribed technical data,
see section "Technical data", Page 26.
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