What does OL2 fault in KEB drive indicate? - Inverter KEB COMBIVERT F5

Contact them direct. They will be interested to hear this. Did you check polarity with a test meter?

https://www.google.com/search?q=keb+inverter+reverse+fault

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I may miss the point here. If the question is how to clear the error, page 57, item 4.7 Error Messages, of the KEB instruction manual may be of use. https://www.manualslib.com/manual/1293218/Keb-Combivert-F5.html?page=55#manual

Here is information about the error code:

KEB Error "E. OP"
ERROR overpotential (voltage)
1 Voltage in the DC-link cicuit is too high.
Occurs if the DC-link circuit voltage exceeds the permisible value.
Causes:
- poor controller adjustment (overshooting)
- input voltage too high
- interference voltages at the input
- deceleration ramp to short
- braking resistor defective or too small

Given the very technical nature of the KEB, I lean toward referring to the manufacturer's support. There are quite a number of KEB YouTube videos and a number of supporting documentations available on the web. Perhaps the following will be of use if not an entire misdirection: https://www.kebamerica.com/elevator-support/

https://www.kebamerica.com/products/f5-inverter/

Perhaps email [email protected]

Further contact details:

http://www.servotechnica.spb.ru/viewdocument/KEB_CD/manuals/f5/f5s/00f5subk250.pdf?page=33

https://www.manualslib.com/manual/1297119/Keb-Combivert-F4-F.html

Eprom programming is beyond my expertiese.

These are all messages that follow overheating. E.nOH indicates that the heat sink has returned to the normal temperature range and the unit can be reset. E. OH indicates that the power module is over-temperature. This could be caused by insufficient air flow at the heat sink. That is caused by dust/dirt. The ventilator could be clogged or the ambient temperature is too high. E. OH2 indicates that the motor protection relay was tripped. Check for dust/dirt and clean any filters. Make sure that nothing is blocking the air flow around the unit.

KEB uses these error mesages on the CombiVert F6, https://www.keb.de/fileadmin/media/Manuals/f5/control/f5m/00f5mebk320.pdf .

I hope this helps.

Cindy Wells

Vmi is not a KEB fault code.

See "Inverter KEB COMBIVERT F5 Tips & How Tos"

Unit will need to be repaired or replaced.

at the first i want to know the error message appear after switch on the power on the drive with out any load or with load .

Please provide part# of the unit in question and manufacture of machine.