Keb inverter f5 error e.pu - Inverter KEB COMBIVERT F5

E.PU is a general power stage failure.

Without knowing the part number of the actual inverter with the problem it is difficult to speculate what the actual problem is.

One thing to do is to check if the fan is operating. Some of the older F5 inverters utilized a feedback loop so that the inverter could tell if the fan was functioning properly. If the fan was not functioning the inverter would trip into E.PU.

The E.pu error is a general power stage failure.
Typically means that the unit has a defective power stage that would need to be replaced.
If it is an old inverter(early 2000's) there is a possibility that it could be a cooling fan problem since at that time there was a three wire fan used. May be able to replace the fan (must obtain from KEB) but there may still be problems with power stage. If it is from early 2000's then you might be better off replacing the unit with new current version.

General error of the power stage in the inverter. Part# and ser# of inverter would help troubleshoot better.

Maybe a problem with cooling fan if it is an older inverter. Typically when the error E.PU appears, it is too late. Power stage maybe damaged and would need to be replaced.

General power stage failure.

Most likely will need to replace the power stage or inverter.

error e.pu

Tips How Tos for Inverter KEB COMBIVERT F5

E.Pu means there is a problem with the power stage. Perhaps your cooling fans are clogged and not spinning.

Hard to say with out knowing what the part# of the inverter is.

Most likely a problem with the power stage. Unit should be repaired.

Do you have the part# of the unit in question?

Most likely when the DC bus capacitors and input rectifier were damaged, it also damaged the circuit board.

Wiser to replace inverter or send it in to a KEB facitlity to be repaired.

Check tips section of Fixya.