2
* Manual starting/stopping of defrost.
The defrost cycle is automatic started and stopped. These defrost settings thru internal parameters.
Stop defrost:
If there is a defrost cycle , the defrost can be manually stopped by pushing the
UP
and
the
DOWN
key simultaneously.
Start defrost:
If there is no defrost cycle , the defrost can be manually started by pushing the
UP
and
the
DOWN
key simultaneously.
* Sensor adjustment.
The
temperature-sensor
can be adjusted by using the Offset control sensor (parameter 05). The
defrost-sensor
can be adjusted by using the Offset defrost sensor (parameter 07). For read out of the
defrost sensor on the display use parameter 06 (Only if parameter 08 = 1).
Indicates a sensor e.g. 2
C too much, the according Sensor-offset parameter has to be decreased with
2
C.
* Error messages.
In the display of the
ALFA(NET) 55 RTDF
the following error messages can appear:
LO
- Minimum alarm
Solution E1/E2:
HI
- Maximum alarm
- Check if sensor is connected correctly.
E1
- Control sensor failure
- Check sensor (1000
/25
C).
E2
- Defrost sensor failure
- Replace sensor.
EEE
- Settings are lost.
Solution EEE:
- Reprogram the settings.
-L-
- In case of sensor short-circuit the display alternates between error-code
E..
and
-L-
, as indication for a short-circuit sensor.
-H-
- In case of open-circuit sensor the display alternates between error-code
E..
and
-H-
, as indication for a open circuit sensor.
Reset Alarm.
When a error-messages appears it can be reset by pushing the
SET
key. The function
of this key depends on parameter P37.
* Alarm operation.
As a failure or alarm occurs an error message is shown in the display. The
ALFA(NET) 55 RTDF
remembers it’s error message, although it is already solved. The error message is resettable with the
SET
key.
As if after pressing the
SET
key (=reset alarm) the alarm still is not solved than the
ALFA(NET) 55
RTDF
displays the temperature and the error message alternated, is the alarm solved, then the error
message disappears and the temperature is displayed normally.
* Setting internal parameters.
Next to the adjustment of the setpoint, some internal settings are possible like differentials, sensor-
adjustments, setpoint-range, compressor-, fan-, defrost- and alarm-settings.
By pushing the
DOWN
key for more than 10 seconds, you enter the 'internal programming menu'.
In the left display the upper and the lower segments 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
and
DOWN
keys allows you to change the value of this parameter.
If after 20 seconds no key is pushed, the
ALFA(NET) 55 RTDF
changes to it’s normal operation mode.
Содержание ALFANET 55 RTDF
Страница 6: ...6 Dimensions...
Страница 7: ...7 Connections...
