I
Selection of the emergency setpoint value for the cold store
temperature:
This will be activated if the data in the memory is lost and if alarm
AL1 is activated. This sets all program parameters to the preset
value. The cold store temperature setpoint can be preset to +4 °C
or –18 °C, as desired. This ensures that chilling systems with
temperatures above zero do not freeze and deepfreeze
installations do not thaw.
DIP switch 1, Pos.: off: Setpoint value at +4 °C for emergency
operation. Advisable for chilled storage
(= Preset value).
DIP switch 1, Pos.: on: Setpoint value at –18 °C for emergency
operation. Advisable for deepfreezers.
6 Operation of the controller
Front view of controller:
6.1 Switching on the operating voltage
The controller is started by means of a control switch provided by the
customer.
The first time the controller is started, pre-programmed setting values
are used which at a later point can be adapted for individual
requirements.
If alarm “AL 2” (temperature in refrigerated chamber too high
or too low) is displayed when the controller is switched on, this
can be cleared by pressing the
key.
6.2 Display
During normal operation the current cold store temperature is
displayed. It is measured with cold store sensor T1.
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