Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual

Also see for VLT AutomationDrive FC 302: Service guide Programming guide Instruction manual Installation guide Operating guide

Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual Manual pdf 60 page image

7.6 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 power fuses and tripped circuitbreaker in this table for possible causes.Follow the recommendations provided.No power to the LCP. Check the LCP cable for proper connection ordamage.Replace the faulty LCP or connectioncable.Shortcut on control voltage(terminal 12 or 50) or at controlterminals.Check the 24 V control voltage supply forterminal 12/13 to 20-39 or 10 V supply forterminal 50 to 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 connectioncable.Internal voltage supply fault orSMPS is defective. Contact supplier.IntermittentdisplayOverloaded power supply(SMPS) due to improper controlwiring or a fault within thefrequency converter.To rule out a problem in the control wiring,disconnect all control wiring by removing theterminal blocks.If the display stays lit, the problem is inthe control wiring. Check the wiring forshorts or incorrect connections. If thedisplay continues to cut out, follow theprocedure for Display dark\No function.Motor notrunningService switch open or missingmotor connection.Check if the motor is connected and theconnection is not interrupted (by a serviceswitch or other devise).Connect the motor and check the serviceswitch.No mains power with 24 V DCoption card.If the display is functioning, but there is nooutput, check that mains power is applied tothe frequency converter.Apply mains power to run the unit.LCP Stop. Check if [Off] has been pressed. Press [Auto On] or [Hand On] (dependingon operation mode) to run the motor.Missing start signal (Standby).Check parameter 5-10 Terminal 18 Digital Inputfor correct setting for terminal 18 (use defaultsetting).Apply a valid start signal to start themotor.Motor coast signal active(Coasting).Check parameter 5-12 Terminal 27 Digital Inputfor correct setting for terminal 27 (use defaultsetting).Apply 24 V on terminal 27 or programmethis terminal to No operation.Wrong reference signal source.Check reference signal:• Local• remote or bus reference?• Preset reference active?• Terminal connection correct?• Scaling of terminals correct?• Reference signal available?Programme correct settings. Checkparameter 3-13 Reference Site. Set presetreference active in parameter group 3-1*References. Check for correct wiring. Checkscaling of terminals. Check referencesignal.Motorrunning inwrongdirectionMotor rotation limit. Check that parameter 4-10 Motor SpeedDirection is programmed correctly. Program correct settings.Active reversing signal.Check if a reversing command is programmedfor the terminal in parameter group 5-1*Digital inputs.Deactivate reversing signal.Wrong motor phaseconnection.See chapter 5.5 Checking Motor Rotation.Maintenance, Diagnostics an... VLT® AutomationDrive FC 30258 Danfoss A/S © 06/2015 All rights reserved. MG34U40277