Four Branch Box LEDs lit, last one unlit — Power frequency error.

What does LED 401-404 Lit / LED 405 Unlit mean?

Four LEDs on the branch box are lit, but the fifth (LED 405) is unlit, indicating an issue with the power frequency.

• Incompatible power supply frequency to the branch box.
• Internal issue with the branch box's power detection circuit.

Click steps to track your progress.

1. 1

   Reset the power to the branch box by turning it off at the circuit breaker, waiting 30 seconds, then turning it back on.

2. 2

   Ensure the power supply to the unit matches the specified frequency (e.g., 50Hz or 60Hz) for your region.

3. 3

   If the error persists, professional service is required to check the branch box and power supply.