Max Supply Voltage μC2 Exceeded

What does 3-1-2-1 mean?

The supply voltage to microcontroller 2 (μC2) within the EL1904 terminal has exceeded its maximum permissible limit. This overvoltage condition can stress internal components and potentially lead to permanent damage to the microcontroller.

• External power supply voltage exceeds the maximum allowable threshold for μC2.
• Power surge or transient event on the supply line.
• Incorrect voltage regulator setting for μC2.
• Component failure within the power conditioning circuitry for μC2.
• Mains voltage fluctuation beyond operational limits (P2-2).

Click steps to track your progress.

1. 1

   Measure the supply voltage at the terminal's power input using a multimeter.

2. 2

   Verify the measured voltage is within the specified operating range for the terminal (refer to technical data for specific values).