Inverter KEB COMBIVERT F5 - Answered Questions & Fixed issues

Registered users on the KEB website have access to the manuals which will provide details on programming the inverters.

I would guess that this is off of a Rieter machine (C51 Carding Machine). They would be your best source of information. Verify that the unit is properly programmed and that the control wires are correct.

Too much current is being required with the motor shaft not rotating. This is most likely a parameter adjustment issue with the motor data, torque limits and protective functions. Possible motor issue as well.

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.

Here is how to use the keypad. If a decimal shows up after the value is changed, enter must be pressed to save the value. Also insure that the inverter is not enabled or in nOP status.

Vmi is not a KEB fault code.

The does not appear to be a KEB error code.

This does not appear to be a KEB error code. If this code is on on your HMI, contact the machine manufacture to determine what this error means.

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.

This may be due to the inverter waiting for an ST signal via buss communications. What is the part # of the unit in question? The inverter is recognizing that terminal 16 is going active but still waiting for another command to enable the inverter.

Verify the mains voltage at terminals L1/L2/L3. If it is present but the inverter does not power up, there is most likely an internal problem. What is the part# of the unit in question?

if the display says LS, it means you are missing the speed and direction command. Via the keypad, provide the direction and then the speed.

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

The inverter will only do what it is being signaled to do. Check the control signals to the inverter and make sure that they are correct. Since there is an encoder on the system, I will assume that this is a closed loop system. Try to home the system.

E.uPh due to the ripple detection of the DC bus. This is typically caused by a missing phase on the input side of the inverter. Measure your mains voltage L1-L2, L2-L3, L1-L3 and L1-ground, L2-ground, L3-ground to verify that your supply voltage is balanced and withing the rated specifications. If the applied voltage is good then there is a problem with the input stage or the DC bus and the unit will need to be repaired or replaced.

Look under the E.puch tip section.

Pretty general question. If it is a replacement inverter, best source would be to upload parameter values from original inverter with the COMBIVIS software.

Otherwise I would suggest downloading the manual from the KEB web site.

These can be obtained from the KEB web site.

The manual that came with the inverter has instructions on how to go from mode to mode.

If you do not have the manual, these can be downloaded from the KEB web site.

If you are talking about error code 59 then the error is E.HybC. E.HybC means that the feedback card on the inverter has been changed. You must confirm the change at parameter ec.0 or ec.10. The inverter reads the value from the feedback card so all you have to do it hit enter to confirm the value. If you have not changed the feedback card but the error continues to come back then there is a problem with the feedback card or the control card.