What this code means

The SW continuously checks for the connection of the two supply ends of the potentiometer in the accelerator. The test consists of reading the voltage drop on a sense diode, connected between NPOT (CNA#30) and GND and cascaded with the potentiometer: if the potentiometer gets disconnected on PPOT (CNA#25) or NPOT, no current flows in this sense diode and the voltage on the NPOT connection collapses down. When the NPOT voltage is less than 0.3V this alarm occurs. This alarm occurs also when the NPOT voltage is higher than 2Vdc (to detect also the condition of a broken sense diode).

Applies to: ZAPI ACE0 / COMBIAC0 controller.

Possible causes / checks (from the source)

Check the voltage on NPOT and the potentiometer connections.

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