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* Viewing setpoint.

By pushing the 

SET

 key the setpoint appears in the display. The led ‘set’ starts blinking. A few seconds

after releasing the 

SET

 key the setpoint disappears and the measured product temperature is shown

in the display.

* Changing setpoint.

Push the 

SET

 key and the setpoint appears in the display. Release the 

SET

 key. Now push the 

SET

key again and together with the 

UP

 or 

DOWN

 keys the setpoint can be changed. A few seconds afer

releasing the keys the measured product temperature  is shown again in the display.

* Manual starting/stopping of defrost.

The defrost cycle is automatic started and stopped. These defrost settings thru internal parameters.
At active defrost the led 'defrost' is on.

Stop defrost:

If there is a defrost cycle, the defrost can by manually stopped by pushing the 

UP

 key and than the

SET

 key, while the 

UP

 key is hold.

Start defrost:

If there is no defrost cycle, the defrost can be started manually by pushing the 

UP

 key and than the

SET

 key, while the 

UP

 key is hold.

* Setting internal parameters.

Next to the adjustment of the setpoint, some internal settings are possible like differential, sensor-
offset, setpoint range and the defrost function.

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

 and 

DOWN

 keys allows you to change the value of this parameter.

If after 20 seconds no key is pushed, the 

ALFA(NET)-45

 changes to it's normal operation mode.

Содержание ALFA-45

Страница 1: ...it is shown how sensors and power supply are to be connected After connecting the ALFA NET 45 to the power supply a self test is started As this test has finished the measured temperature of the produ...

Страница 2: ...t cycle the defrost can by manually stopped by pushing the UP key and than the SET key while the UP key is hold Start defrost If there is no defrost cycle the defrost can be started manually by pushin...

Страница 3: ...er P26 1 Startup delay after power failure Offset defrost sensor Fan off delay if parameter P22 1 Readout defrost sensor 1 15 C 50 50 C 50 50 C 15 15 C 0 3 0 99 1 99 Hours 0 99 Minutes 99 99 C 99 99 C...

Страница 4: ...e of the following parameters is set to 1 the fan can be stopped Parameter 19 1 Fan switch differential active The fan is only active when the defrost temperature is parameter 13 C lower then the meas...

Страница 5: ...st is started when the compressor has run for parameter 7 hours after the last defrost Parameter 25 1 The temperature readout on the display is locked during defrost cycle Parameter 26 1 After power u...

Страница 6: ...play of the ALFA NET 45 the following error messages can appear E1 Product sensor error Fatal error display shows E1 and all relays are deactivated accept when parameter 24 is 1 then the compressor an...

Страница 7: ...se see Product sticker Max used power 6 2 VA Fuse No internal fuse present Product sensor SM 811 2m Defrost sensor SM 811 2m Relay Compressor SPST 250V 16A C NO cos phi 1 Relay Defrost SPST 250V 8A C...

Страница 8: ...8 Dimensions CPU unit Dimensions SUPPLY unit Connections...

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