Danfoss VLT Aqua Drive FC 202 Operating Manual

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

Contents

7.5 TroubleshootingSymptom Possible cause Test SolutionDisplaydark/NofunctionMissing input power. See Table 4.3. Check the input power source.Missing or open fuses, or circuitbreaker tripped.See Open fuses and tripped circuit breaker inthis table for possible causes.Follow the recommendations provided.No power to the LCP. Check the LCP cable for proper connectionor damage.Replace the faulty LCP or connection cable.Shortcut on control voltage(terminal 12 or 50) or at controlterminals.Check the 24 V control voltage supply forterminals 12/13 to 20-39 or 10 V supply forterminals 50–55.Wire the terminals properly.Incompatible LCP (LCP fromVLT® 2800 or 5000/6000/8000/FCD or FCM).–Use only LCP 101 (P/N 130B1124) or LCP102 (P/N 130B1107).Wrong contrast setting. – Press [Status] + [▲]/[▼] to adjust thecontrast.Display (LCP) is defective. Test using a different LCP. Replace the faulty LCP or connection cable.Internal voltage supply fault orSMPS is defective. – Contact supplier.IntermittentdisplayOverloaded supply (SMPS) dueto improper control wiring or afault within the frequencyconverter.To rule out a problem in the control wiring,disconnect all control wiring by removingthe terminal blocks.If the display stays lit, the problem is inthe control wiring. Check the wiring forshort circuits or incorrect connections. Ifthe display continues to cut out, follow theprocedure for display dark.Motor notrunningService switch is open ormissing motor connection.Check if the motor is connected and theconnection is not interrupted (by a serviceswitch or other device).Connect the motor and check the serviceswitch.No mains power with 24 V DCoption card.If the display is functioning but no output,check that mains power is applied to thefrequency converter.Apply mains power to run the unit.LCP stop. Check if [Off] has been pressed. Press [Auto On] or [Hand On] (dependingon operating mode) to run the motor.Missing start signal (Standby). Check parameter 5-10 Terminal 18 DigitalInput for correct setting for terminal 18 (usedefault setting).Apply a valid start signal to start themotor.Motor coast signal active(Coasting).Check parameter 5-12 Terminal 27 DigitalInput for correct setting for terminal 27 (usedefault setting).Apply 24 V on terminal 27 or program thisterminal to No operation.Wrong reference signal source. Check the following:• Reference signal: Local, remote, or busreference.• Preset reference.• Terminal connection.• Scaling of terminals.• Reference signal availability.Program the correct settings. Checkparameter 3-13 Reference Site. Set presetreference active in parameter group 3-1*References.Motor runningin wrongdirectionMotor rotation limit. Check that parameter 4-10 Motor SpeedDirection is programmed correctly.Program the correct settings.Active reversing signal. Check if a reversing command isprogrammed for the terminal in parametergroup 5-1* Digital inputs.Deactivate reversing signal.Wrong motor phaseconnection. – See chapter 5.5 Checking Motor Rotation.Maintenance, Diagnostics, a... VLT® AQUA Drive FC 20246 Danfoss A/S © 10/2016 All rights reserved. MG20MD0277