Danfoss VLT AQUA Drive FC 202 Design Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

8.6.4 Warning and Alarm IntroductionThe warning/alarm information below defines eachwarning/alarm condition, provides the probable cause forthe condition, and details a remedy or troubleshootingprocedure.Test procedures are described in the service manual andshould only be performed by qualified personnel.WARNING 1, 10 Volts lowThe control card voltage is below 10 V from terminal 50.Remove some of the load from terminal 50, as the 10 Vsupply is overloaded. Max. 15 mA or minimum 590 Ω.This condition can be caused by a short in a connectedpotentiometer or improper wiring of the potentiometer.TroubleshootingRemove the wiring from terminal 50. If the warning clears,the problem is with the customer wiring. If the warningdoes not clear, replace the control card.WARNING/ALARM 2, Live zero errorThis warning or alarm only appears if programmed by theuser in 6-01 Live Zero Timeout Function. The signal on oneof the analogue inputs is less than 50% of the minimumvalue programmed for that input. Broken wiring or faultydevice sending the signal can cause this condition.TroubleshootingCheck connections on all the analog inputterminals:• Control card terminals 53 and 54 forsignals, terminal 55 common.• MCB 101 terminals 11 and 12 for signals,terminal 10 common.• MCB 109 terminals 1, 3, 5 for signals,terminals 2, 4, 6 common).Check that the frequency converter programmingand switch settings match the analog signal type.Perform input terminal signal test.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 on the frequency converter.Options are programmed at 14-12 Function at MainsImbalance.TroubleshootingCheck the supply voltage and supply currents to thefrequency converter.WARNING 5, DC link voltage highThe intermediate circuit voltage (DC) is higher than thehigh voltage warning limit. The limit is dependent on thefrequency converter voltage rating. The unit is still active.WARNING 6, DC link voltage lowThe intermediate circuit voltage (DC) is lower than the lowvoltage warning limit. The limit is dependent on thefrequency converter voltage rating. The unit is still active.WARNING/ALARM 7, DC overvoltageIf the intermediate circuit voltage exceeds the limit, thefrequency converter trips after a time.Troubleshooting• Connect a brake resistor• Extend the ramp time• Change the ramp type• Activate the functions in 2-10 Brake Function• Increase 14-26 Trip Delay at Inverter FaultWARNING/ALARM 8, DC under voltageIf the intermediate circuit voltage (DC link) drops belowthe under voltage limit, the frequency converter checks fora 24 V DC backup supply. If no 24 V DC backup supply isconnected, the frequency converter trips after a fixed timedelay. The time delay varies with unit size.Troubleshooting• Check that the supply voltage matches thefrequency converter voltage.• Perform input voltage test.• Perform soft charge circuit test.WARNING/ALARM 9, Inverter overloadThe frequency converter is about to cut out because of anoverload (too high current for too long). The counter forelectronic, thermal inverter protection gives a warning at98% and trips at 100%, while giving an alarm. Thefrequency converter cannot be reset until the counter isbelow 90%.The fault is that the frequency converter is overloaded bymore than 100% for too long.Troubleshooting• Compare the output current on the LCP with thefrequency converter rated current.• Compare the output current on the LCP withmeasured motor current.• Display the thermal drive load on the LCP andmonitor the value. When running above thefrequency converter continuous current rating,the counter increases. When running below thefrequency converter continuous current rating,the counter decreases.See chapter 8.5 Special Conditions for more details if a highswitching frequency is required.WARNING/ALARM 10, Motor overload temperatureAccording to the electronic thermal protection (ETR), themotor is too hot. Select whether the frequency convertergives a warning or an alarm when the counter reaches100% in 1-90 Motor Thermal Protection. The fault occursGeneral Specifications and ... Design Guide196 Danfoss A/S © Rev. 06/2014 All rights reserved. MG20Z20288