Min Supply Voltage μC2 Not Met

What does 0104 hex mean?

This diagnostic code (found within FA00:03 Supply error) indicates that the supply voltage to the secondary microcontroller (μC2) has fallen below its minimum permissible limit. Similar to μC1 undervoltage, this condition can cause unstable operation, data corruption, or unexpected shutdowns, impairing the terminal's safety and reliability.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Inspect the power supply cables and connections for any signs of voltage drop or loose contacts.