Danfoss VLT AQUA Drive FC 202 Instruction Manual

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

Contents

7.4 List of Warnings and AlarmsThe warning/alarm information below defines eachwarning/alarm condition, provides the probable cause forthe condition, and details a remedy or troubleshootingprocedure.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 analog inputs is less than 50% of the minimumvalue programmed for that input. Broken wiring or faultydevice sending the signal can cause this condition.Troubleshooting• Check connections on all the analog inputterminals. Control card terminals 53 and 54 forsignals, terminal 55 common. MCB 101 terminals11 and 12 for signals, terminal 10 common. MCB109 terminals 1, 3, 5 for signals, terminals 2, 4, 6common.• Check that the adjustable frequency driveprogramming and switch settings match theanalog signal type.• Perform Input Terminal Signal Test.WARNING/ALARM 3, No motorNo motor has been connected to the output of theadjustable frequency drive.WARNING/ALARM 4, Mains phase lossA phase is missing on the supply side, or the line voltageimbalance is too high. This message also appears for afault in the input rectifier on the adjustable frequencydrive. Options are programmed at 14-12 Function at MainsImbalance.TroubleshootingCheck the supply voltage and supply currents to theadjustable frequency drive.WARNING 5, DC link voltage highThe intermediate circuit voltage (DC) is higher than thehigh voltage warning limit. The limit is dependent on theadjustable frequency drive voltage rating. The unit is stillactive.WARNING 6, DC link voltage lowThe intermediate circuit voltage (DC) is lower than the lowvoltage warning limit. The limit is dependent on theadjustable frequency drive voltage rating. The unit is stillactive.WARNING/ALARM 7, DC overvoltageIf the intermediate circuit voltage exceeds the limit, theadjustable frequency drive 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 undervoltageIf the intermediate circuit voltage (DC link) drops belowthe undervoltage limit, the adjustable frequency drivechecks if a 24 V DC backup supply is connected. If no 24 VDC backup supply is connected, the adjustable frequencydrive trips after a fixed time delay. The time delay varieswith unit size.Troubleshooting• Make sure that the supply voltage matches theadjustable frequency drive voltage.• Perform input voltage test.• Perform soft charge circuit test.WARNING/ALARM 9, Inverter overloadThe adjustable frequency drive is about to cut out becauseof an overload (too high current for too long). The counterfor electronic, thermal inverter protection gives a warningat 98% and trips at 100%, while giving an alarm. Theadjustable frequency drive cannot be reset until thecounter is below 90%.The fault is that the adjustable frequency drive isoverloaded by more than 100% for too long.Troubleshooting• Compare the output current shown on the LCPwith the adjustable frequency drive rated current• Compare the output current shown on the LCPwith measured motor current• Display the Thermal Drive Load on the LCP andmonitor the value. When running above theadjustable frequency drive continuous currentrating, the counter should increase. Whenrunning below the adjustable frequency drivecontinuous current rating, the counter shoulddecreaseMaintenance, Diagnostics an... Instruction ManualMG20MA22 Danfoss A/S © 10/2014 All rights reserved. 417 7