Danfoss VLT 5000 Series Operating Instructions Manual

Also see for VLT 5000 Series: Manual Instruction manual Instructions Operating instructions Quick setup

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Danfoss VLT 5000 Series Operating Instructions Manual Manual pdf 165 page image

VLT ® 5000 Series■ Trouble-shootingSymptom How to handle1. Motor runs unevenly If the motor runs unevenly, but no fault is given, this may be becausethe frequency converter has been wrongly set.Adjust the motor data settings.Contact Danfoss if the new setting does not make the motor runevenly.2. Motor does not run Check if there is a backlight in the display.If there is a backlight, please check if a fault message is displayed.If yes, please consult the Warnings-section, if no, please refer tosymptom 5.If there is no backlight, check if the frequency converter is connectedto mains supply. If yes, please refer to symptom 4.3. Motor does not brake Please refer to Control with brake function.4. No message or backlight indisplayCheck if the prefuses for the frequency converter have blown.If yes, call Danfoss for assistance.If no, check if the control card is overloaded.If so, disconnect all control signal plugs on the control card andcheck if the fault disappears.If yes, make sure that the 24 V supply is not short-circuited.If no, call Danfoss for assistance.5. Motor stopped, light in display,but no fault reportStart the frequency converter by pressing [START] on the controlpanel.Check if the display is frozen, ie. the display cannot be changedor is indefineable.If yes, check if screened cables have been used and are connectedcorrectly.If no, check that the motor is connected and that all motor phasesare OK.The frequency converter must be set to run using local references:Parameter 002 = Local operationParameter 003 = desired reference valueConnect 24 V DC to terminal 27.The reference is changed by pressing ’+’ or ’-’.Is the motor running?If yes, check whether control signals to the control card are OK.If no, call Danfoss for assistance.MG.51.A9.02 - VLT is a registered Danfoss trademark164