Danfoss VLT HVAC FC 100 Operating Instructions Manual

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Danfoss VLT HVAC FC 100 Operating Instructions Manual Manual pdf 58 page image

9 Basic Troubleshooting9.1 Start Up and OperationSymptom Possible Cause Test SolutionDisplay dark / No functionMissing input power See Table 3.1. Check the input power source.Missing or open fuses or circuitbreaker trippedSee open fuses and tripped circuitbreaker in this table for possiblecauses.Follow the recommendationsprovidedNo power to the LCP Check the LCP cable for properconnection or damage.Replace the faulty LCP orconnection cable.Shortcut on control voltage(terminal 12 or 50) or at controlterminalsCheck the 24 V control voltagesupply for terminal 12/13 to 20-39or 10 V supply for terminal 50 to55.Wire the terminals properly.Wrong LCP (LCP from VLT® 2800or 5000/6000/8000/ FCD or FCM)Use only LCP 101 (P/N 130B1124)or LCP 102 (P/N 130B1107).Wrong contrast setting Press [Status] + [▲]/[▼] to adjustthe contrast.Display (LCP) is defective Test using a different LCP. Replace the faulty LCP orconnection cable.Internal voltage supply fault orSMPS is defectiveContact supplier.Intermittent displayOverloaded power supply (SMPS)due to improper control wiring ora fault within the frequencyconverterTo rule out a problem in thecontrol wiring, disconnect allcontrol wiring by removing theterminal blocks.If the display stays lit, then theproblem is in the control wiring.Check the wiring for shorts orincorrect connections. If the displaycontinues to cut out, follow theprocedure for display dark.Motor not runningService switch open or missingmotor connectionCheck if the motor is connectedand the connection is notinterrupted (by a service switch orother device).Connect the motor and check theservice switch.No mains power with 24 V DCoption cardIf the display is functioning but nooutput, check that mains power isapplied to the frequency converter.Apply mains power to run the unit.LCP Stop Check if [Off] has been pressed. Press [Auto On] or [Hand On](depending on operation mode) torun the motor.Missing start signal (Standby) Check 5-10 Terminal 18 Digital Inputfor correct setting for terminal 18(use default setting).Apply a valid start signal to startthe motor.Motor coast signal active(Coasting)Check 5-12 Coast inv. for correctsetting for terminal 27 (use defaultsetting).Apply 24 V on terminal 27 orprogram this terminal to Nooperation.Wrong reference signal source Check reference signal: Local,remote or bus reference? Presetreference active? Terminalconnection correct? Scaling ofterminals correct? Reference signalavailable?Program correct settings. Check3-13 Reference Site. Set presetreference active in parametergroup 3-1* References. Check forcorrect wiring. Check scaling ofterminals. Check reference signal.Basic Troubleshooting VLT® HVAC Drive D-FrameOperating InstructionsMG16D102 - VLT® is a registered Danfoss trademark 559 9