Operating Manual DTT 6801 Multicontroller (MC) 086100037 © Pfannenberg GmbH Page 13 / 49
2.4.8 Energy-saving mode
Cooling units with multi-controller (MC) are equipped with energy-saving mode. Therefore, the cooling units have a
seconds TS2 temperature sensor (1) that monitors the temperature inside the switch cabinet.
The TS2 temperature sensors (1) is included in the accessory kit and is installed externally on the cooling unit. The
connecting plug (3) is plugged into the mating plug (2) on the cooling unit for installation. The mating plug (2) is
identified as X51 in the circuit diagram; see Electrical connection.
The TS2 temperature sensors (1) can be positioned relatively arbitrarily within the switch cabinet due to its length
and can be fixed with a cable tie.
Positioning the TS2 temperature sensor in an area where heat develops the most is recommended.
Energy-saving mode function
In the condition as supplied, energy-saving mode is activated when cooling operation is not activated for 30
minutes. The LCD then displays energy function "EN", see system information can be displayed.
If the switch cabinet interior temperature increases above the adjusted temperature setpoint during active
operation a cooling command is sent and energy-saving mode is interrupted.
Cooling mode remains active until the temperature setpoint, minus hysteresis, has been reached. Energy-
saving mode always activates 30 minutes after the temperature setpoint is reached.
If the temperature setpoint is undercut by the external TS2 temperature sensor (1) in energy-saving mode, the
evaporator fan (internal) switches off. The temperature setpoint is measured minus hysteresis.
If the external TS2 temperature sensor (1) detects a temperature that exceeds the temperature setpoint, the
evaporator fan (internal) switches on. The value of the temperature setpoint is measured plus hysteresis.
If no fault occurs, the fault indication output is closed in energy-saving mode.
Figure 14 – TS2- Temperature sensor
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