2
*Changing set point.
Push the SET key and the set point appears in the display. Release the at SET key.
Now push the SET key again and together with the UP or DOWN keys the set point
can be changed. A few seconds after releasing the keys the measured temperature
shows again in the display.
*Starting/stopping defrost.
The defrost cycle is automatically started and stopped. Programming by the internal
parameters. During defrost the led 'defrost' will light-up.
If there is a defrost cycle, the defrost can be stopped by hand, pushing the UP key
and then the SET key, while the UP key is held.
If there is no defrost cycle, the defrost can be started by hand, pushing the UP key
and then the SET key, while the UP key is held.
*Setting internal parameters.
Next to the adjustment of the set point, some internal settings are possible like
differential, sensor-offset, set point range and the function cooling or defrost.
By pushing the DOWN key more than 10 seconds, you enter the 'internal
programming menu'. In the left display the upper and lower segment are blinking.
Over the UP and DOWN keys the required parameter can be selected (see table for
the parameters).
If the required parameter is selected, the value can be read-out by pushing the SET
key. Pushing the UP or DOWN keys together with the SET key allows you to change
the value of this parameter.
If after 20 seconds no key is pushed, the ALFA(NET) 25 DP changes to it's normal
operation mode.
*Adjustment sensor.
The sensor can be adjusted by using the Sensor Offset (parameter 04).
Indicates the ALFA(NET) 25 DP e.g. 2C too much, the Sensor Offset has to de
decreased with 2C.
*Error messages.
In the display of the ALFA(NET) 25 DP the following error messages can appear:
Er - Sensor broken. Solution:
- Check if the sensor is connected correctly.
- Check the sensor (1000at 25C).
- Replace the sensor.
EE - Settings are lost. Solution:
- Reprogram the settings.
*Function Diagam.
