Max Supply Voltage μC1 Exceeded

What does 0101 hex mean?

This diagnostic code (found within FA00:03 Supply error) signifies that the supply voltage to the primary microcontroller (μC1) has exceeded its maximum permissible limit. Overvoltage can cause immediate damage to the microcontroller, leading to erratic behavior or complete failure of the terminal's safety functions.

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.