If its not a faulty switch / fuse or a loose connection,
Then it could be a blown fuse only on one phase,
Possibly the phases are not balanced and there
is too much om one phase.
There will be a fuse for each of the three phases.
call poco !
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!