Cause : Reduced run comes when number of supply modules detected does not match the value of parameter 195.13 Reduced run mode, or the value of parameter 195.13 Reduced run mode indicates a configuration that is not possible.

1. Check that the value of 195.13 Reduced run mode corresponds to the number of supply modules present.
2. Check that the modules present are powered from the DC bus and connected by fiber optic cables to the BCU control unit.