Undervoltage

What does 9 mean?

The DC-link voltage has fallen below its acceptable operating limits. This can be caused by a low incoming supply voltage, a defective input fuse, an external charge switch failing to close, or an internal AC drive fault. Prolonged undervoltage can cause erratic drive behavior, prevent proper starting, and potentially stress internal components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the status of any external charge switch, ensuring it is closed when required.

2. 4

   If the supply voltage is sufficient, reset the fault and restart; if it recurs, contact the distributor for internal fault diagnosis.