Environment Error: μC1 supply voltage below minimum

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When LED Diag 1 is off and LED Diag 2 flashes with code 2 (400ms ON / 400ms OFF), it indicates that the internal supply voltage for microcontroller μC1 has fallen below its minimum permissible value. This environment error suggests insufficient power delivery, which could lead to erratic behavior, component instability, or a complete shutdown of safety functions for μC1.

• External power supply voltage is below the minimum operational requirement for μC1.
• Under-voltage condition from the primary power source.
• Loose connection in the primary power wiring.
• Internal power supply circuit failure.

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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.