Under voltage

What does 9 mean?

The DC-link voltage has dropped below the internal safety limit of the frequency converter. The most common causes include a supply voltage that is too low, or a power outage. In some cases, it could also indicate an internal fault within the frequency converter.

• Input voltage below minimum threshold (e.g., P1-01 < P1-02).
• Loss of one or more input phases.
• Faulty main power supply unit.
• Brownout condition affecting the DC bus voltage.
• Incorrect voltage setting for the operating environment.

Click steps to track your progress.

1. 1

   Check the incoming supply voltage at the frequency converter's input terminals to ensure it is within specified limits.

2. 2

   If the fault was caused by a temporary supply voltage interruption, reset the fault and restart the frequency converter.