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.

• The supply voltage connected to microcontroller 2 (μC2) has exceeded its maximum allowed threshold.
• Overvoltage condition on the power supply line to μC2.
• Power supply regulation failure or external voltage surge affecting μC2.

Click steps to track your progress.

1. 1

   Measure the input supply voltage to the EL6900 terminal using a multimeter at the power terminals.

2. 2

   Verify that the external power supply unit providing power to the terminal is operating within its specified voltage range.

3. 3

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