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PI to the power supply, a self-test function is started. As this test is finished, the measured temperature appears in the display. 3 Control The ALFA(NET) 71 PI thermostat can be controlled by four pushbutton on the front. These keys are; - view / change set value and reset alarm. ∏ UP - increase set value.
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ALFA(NET) 71 PI -10/+ 90°C Doc.no.: 151043 version 1.1 4 Viewing setpoint By pushing the SET key the setpoint appears in the display. The decimal point of the last display starts blinking. A few seconds after releasing the SET key the setpoint disappears and the measured temperature is shown again in the display.
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ALFA(NET) 71 PI -10/+ 90°C Doc.no.: 151043 version 1.1 9 Error messages In the display of the ALFA(NET) 71 PI the following error messages can appear: - Minimum alarm. Solution E1: - Maximum alarm. - Check if the sensor is connected correctly.
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If the required parameter is selected, the value can be read-out by pushing the SET key. Pushing the UP or DOWN key to change the value of this parameter. If after 20 seconds no key is pushed, the ALFA(NET) 71 PI changes to the normal operation mode. 11.1 Parameters ALFA(NET) 71 PI...
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ALFA(NET) 71 PI -10/+ 90°C Doc.no.: 151043 version 1.1 Para- Description Parameter Range Default meter value Minimum adjustable setpoint -10.0 .. +90.0°C -10.0 Maximum adjustable setpoint -10.0 .. +90.0°C +90.0 Readout in whole degrees 0 = No, 1 =Yes Alarm type 0 = None 0 ..
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ALFA(NET) 71 PI -10/+ 90°C Doc.no.: 151043 version 1.1 12 Function diagram Pagina 6 van 8...
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ALFA(NET) 71 PI -10/+ 90°C Doc.no.: 151043 version 1.1 13 Connections Pagina 7 van 8...
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