DC under voltage

What does ALARM 8 mean?

The DC-link voltage has dropped below the undervoltage limit. If no 24V DC back-up supply is connected, the frequency converter will trip after a fixed time delay (varying by unit size). This indicates insufficient input power, which can lead to uncontrolled motor shutdown.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Perform a soft-charge circuit test to ensure it's functioning correctly.