KEB COMBIVERT F4-F Applications Manual

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KEB COMBIVERT F4-F Applications Manual Manual pdf 257 page image

3ANTRIEBSTECHNIK9 1 3KEB COMBIVERT F4-FName: Basis06.05.999Error AssistanceSection PageDate© KEB Antriebstechnik, 1999All Rights reservedChapter9.1 Troubleshooting9.1.1 General9. ErrorAssistanceThe following chapter shall help you to avoid errors as well as help you to determineand remove the cause of errors on your own.If error messages or malfunctions occur repeatedly during operation, the first thing todo is to pinpoint the exact error. To do that go through the following checklist:- Is the error reproducable ?For that reset the error and try to repeat it under the same conditions. If the error canbe reproduced, the next step is to find out during which operating phase the erroroccurs.- Does the error occur during a certain operating phase (e.g. always duringacceleration)?If so, consult the error messages and remove the causes listed there.- Does the error occur or disappear after a certain time?That may be an indication for thermal causes. Check, whether the inverter is used inaccordance to the ambient conditions and that no moisture condensation takes place.9.1.2 Error Messagesand their CauseError messages are always represented by an „E“ and the corresponding error in thedisplay of KEB COMBIVERT. In the following the displayed indications and their causesare described.Occurs when the DC-link voltage drops below the permissible value.Causes: - input voltage too low or instable- inverter rating too low- voltage losses through wrong wiring- supply voltage from generator/transformer breaks downat very short ramps- one phase of input voltage missing (ripple detection)Occurs when the DC-link voltage rises above the permissible value.Causes: - input voltage too high- interference voltages at the input- deceleration ramp too short- wrong connected braking resistor- braking module defectOccurs when the specified peak current is exceeded.Causes: - short circuit at the output- ground fault- motor cable too long- EMCOvervoltageUndervoltageOvercurrent