Max Supply Voltage μC2 Exceeded

What does 0102 hex mean?

This diagnostic code (found within FA00:03 Supply error) indicates that the supply voltage to the secondary microcontroller (μC2) has exceeded its maximum permissible limit. Similar to μC1 overvoltage, this can result in damage to the microcontroller, compromising the terminal's safety integrity and overall operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check for any transient voltage spikes on the supply line using an oscilloscope.