General Functions - Pfannenberg DTT 6401 Serie Instrucciones De Servicio

ENG
5 Operation
5.1

General functions

ATTENTION
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. 26: Function of the electronic controller
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 different items of system information are shown in the control panel (2),
see "Controller", Page 17.
• Switch on the power supply to the cooling unit after completing the assembly and installation work.
• The cooling unit (3) 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 23.
• 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 (3) is equipped with an electronic controller. A temperature sensor (5) measures the temperature of the
sucked in interior switch cabinet air (4).
• 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 (2) shows the error number alternately with
the temperature.
NOTE
• The ambient conditions and switch cabinet interior temperatures must match the specified technical data, see chapter
"Technical data", Page 27.
Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 400 V, 3~ | 086100035c
ERROR
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