Environment Error: μC2 supply voltage below minimum

What does 4 mean?

When LED Diag 1 is off and LED Diag 2 flashes with code 4 (400ms ON / 400ms OFF), it indicates that the internal supply voltage for microcontroller μC2 has fallen below its minimum permissible value. This environment error can lead to unreliable operation or unexpected behavior of the TwinSAFE component due to insufficient power for μC2, potentially impacting safety integrity.

• External power supply voltage is below the minimum operational requirement for μC2.
• Under-voltage condition from the primary power source.
• Loose connection in the primary power wiring.
• Internal power supply circuit failure.

Click steps to track your progress.

1. 1

   Measure input voltage at the power supply terminals (e.g., L1, L2) to confirm it's above minimum specified range.

2. 2

   Check continuity of power supply wiring from the source to the device terminals.

3. 3

   Ensure filter components on the power input are functioning correctly.

4. 4

   Disconnect external power and re-verify voltage readings.