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Questions & Answers
Inverter IGBT failuair again& again
If you are continually replacing the inverters, there may be an external issue causing the failures.
If you are continually replacing IGBT's on the same inverter, then there is most likely a problem with the circuit controlling the IGBT's.
on Jul 23, 2018
KEB COMBIVERT F5 help
When ever you have a questions about a KEB Combivert inverter, it is best to provide as much information as possible. At a minimum provide the following:
Part# or art-nr
Serial # or ser-nr
Type of machine
KEB manufactures many different types of F5 inverters and each type has different hardware, software and functionality. With the above information it is easier to provide a better solution to the problem.
on May 20, 2017 | Inverter KEB COMBIVERT F5
What is no_PO error
no_PU = No power unit. 24Vdc is being supplied to the control card with no AC voltage (230 or 400) being supplied to L1/L2/L3.
Verify AC voltage is present at L1/L2/L3.
*If not present, apply voltage and no_PU should clear.
*If present and unit still no_PU, there is a problem with the power stage. At that point unit should be replaced or repaired.
on Jul 25, 2016
Always showing alarm EOC,EOP
The system that you described is a closed-loop system. The inverter tells the motor what to do and the encoder send information back to the inverter to verify the operations.
With out knowing part# and serial number of the unit in question, I do not know exactly which inverter you are having problems with.
With E.OC error, there is a lot of current demand on the inverter. This could mean a short in the motor, motor leads, connections or inside of the inverter. This could also be caused by the encoder feedback loop being defective. If the inverter tells the motor to run at 1000rpm and the feedback tells the inverter it is only running at 5rpm, the inverter will send out more current to get the motor up to speed.
Since you are getting multiple errors, there could be other internal problems with the inverter especially if the unit is old and contaminated internally.
on Jun 03, 2015
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