ABB ACS880 Drive
1
Posts
1
Users
0
Reactions
293
Views
Jun 10, 2024 1:08 pm
Cause: BU current difference comes when AC phase current difference between parallel-connected inverter modules is excessive.
The fault code 2391 in your ABB ACS880 drive indicates a AC current difference issue between parallel-connected inverter modules. This means the DC current flowing through each module isn't balanced.
- Check there are no power factor correction capacitors or surge absorbers in motor cable.
- Check motor cabling.
