Danfoss VLT AutomationDrive FC 361 Operating Manual

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Danfoss VLT AutomationDrive FC 361 Operating Manual Manual pdf 49 page image

9.5 List of Warnings and AlarmsThe following warning and alarm information defines eachwarning or alarm condition, provides the probable causefor the condition, and details a remedy or troubleshootingprocedure.WARNING 1, 10 Volts lowThe control card voltage is less than 10 V from terminal 50.Remove some of the load from terminal 50, as the 10 Vsupply is overloaded. Maximum 15 mA or minimum 590 Ω.A short circuit in a connected potentiometer or incorrectwiring of the potentiometer can cause this condition.Troubleshooting• Remove the wiring from terminal 50. If thewarning clears, the problem is with the wiring. Ifthe warning does not clear, replace the controlcard.WARNING/ALARM 2, Live zero errorThis warning or alarm only appears if programmed inparameter 6-01 Live Zero Timeout Function. The signal on 1of the analog inputs is less than 50% of the minimumvalue programmed for that input. Broken wiring or a faultydevice sending the signal can cause this condition.Troubleshooting• Check connections on all analog mains terminals.- Control card terminals 53 and 54 forsignals, terminal 55 common.- VLT® General Purpose I/O MCB 101terminals 11 and 12 for signals, terminal10 common.• Check that the drive programming and switchsettings match the analog signal type.• Perform an input terminal signal test.WARNING/ALARM 3, No motorNo motor has been connected to the output of the drive.WARNING/ALARM 4, Mains phase lossA phase is missing on the supply side, or the mainsvoltage imbalance is too high. This message also appearsfor a fault in the input rectifier. Options are programmed inparameter 14-12 Function at Mains Imbalance.Troubleshooting• Check the supply voltage and supply currents tothe drive.WARNING 5, DC link voltage highThe DC-link voltage (DC) is higher than the high-voltagewarning limit. The limit depends on the drive voltagerating. The unit is still active.WARNING 6, DC link voltage lowThe DC-link voltage (DC) is lower than the low-voltagewarning limit. The limit depends on the drive voltagerating. The unit is still active.WARNING/ALARM 7, DC overvoltageIf the DC-link voltage exceeds the limit, the drive trips aftera certain time.Troubleshooting• Connect a brake resistor.• Extend the ramp time.• Change the ramp type.• Activate the functions in parameter 2-10 BrakeFunction.• Increase parameter 14-26 Trip Delay at InverterFault.• If the alarm/warning occurs during a power sag,use kinetic back-up (parameter 14-10 MainsFailure).WARNING/ALARM 8, DC under voltageIf the DC-link voltage drops below the undervoltage limit,the drive checks for 24 V DC back-up supply. If no 24 V DCback-up supply is connected, the drive trips after a fixedtime delay. The time delay varies with unit size.Troubleshooting• Check that the supply voltage matches the drivevoltage.• Perform an input voltage test.• Perform a soft-charge circuit test.WARNING/ALARM 9, Inverter overloadThe drive has run with more than 100% overload for toolong and is about to cut out. The counter for electronicthermal inverter protection issues a warning at 98% andtrips at 100% with an alarm. The drive cannot be resetuntil the counter is below 90%.Troubleshooting• Compare the output current shown on the LCPwith the drive rated current.• Compare the output current shown on the LCPwith the measured motor current.• Show the thermal drive load on the LCP andmonitor the value. When running above the drivecontinuous current rating, the counter increases.When running below the drive continuouscurrent rating, the counter decreases.WARNING/ALARM 10, Motor overload temperatureAccording to the electronic thermal protection (ETR), themotor is too hot.Select 1 of these options:• The drive issues a warning or an alarm when thecounter is >90% if parameter 1-90 Motor ThermalProtection is set to warning options.• The drive trips when the counter reaches 100% ifparameter 1-90 Motor Thermal Protection is set totrip options.Maintenance, Diagnostics, a... Operating GuideMG06I102 Danfoss A/S © 06/2018 All rights reserved. 479 9