Controller; Dip Switch - Pfannenberg DTT 6401 Serie Instrucciones De Servicio

GB
2.4.4

Controller

Controllers are regulating units for the adjustment of refrigeration functions and operating data. They enable
readouts of system messages and diagnostic data. The controllers have a service interface which enables various
configurations. There is also a connection for collective fault indications.
Cooling units with a standard controller (SC) have a display unit with a green LED light (1). The display unit is
located on the unit cover. Permanent illumination of the green LED light (1) while the mains voltage is connected
indicates fault-free operation. The LED light (1) begins to blink in case of an operational fault or a malfunction. For
detailed information about the error messages, see
2.4.5

DIP switch

The DIP switch on the control circuit board enables regulation and control of setpoints and limit values for
temperatures; see DIP switch.
 Position 4 on the DIP switch controls the adjustment of the temperature unit.
Optional control °C to °F (OFF = °C / ON = °F).
 Activation and deactivation of cooling units fixes the changes on the DIP switch. The settings of the DIP switch
are made at the time of commissioning.
The following values are set in the condition as supplied from the factory:
•
The switch cabinet temperature setpoint is 35°C.
•
The maximum switch cabinet temperature is 50°C.
Operating Manual DTT 6401 Standard Controller (SC) 086100036 © Pfannenberg GmbH
1
Figure 8 – Standard controller (SC) operating display
Error messages .
Figure 9 – DIP switch
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