YASKAWA F7 User Manual

Also see for Varispeed f7: Connection manual Programming manual User guide Instruction manual User manual

Contents

Diagnostics & Troubleshooting 6 - 5Table 6.1 Fault Displays and Processing (continued)DigitalOperator Display Description Cause Corrective ActionFANCooling FAN Err<3021>Drive’s Cooling Fan FaultA Drive’s cooling fan fault was detected,and the Drive overload protection wasactivated based on the internal electricthermal value.This fault is detected when L8-32 is set to 1.The Drive continued runningwith an overload after thecooling fan stopped.Replace the cooling fan.FBLFeedback LossPID Feedback LossThis fault occurs when PID Feedback LossDetection is programmed to fault(b5-12 = 2) and the PID Feedback < PIDFeedback Loss Detection Level (b5-13) forthe PID Feedback Loss Detection Time(b5-14).PID feedback source(e.g. transducer, sensor,building automation signal) isnot installed correctly or is notworking.Verify Drive is programmed toreceive the PID feedback sourcesignal.Check to ensure the PID feedbacksource is installed and workingproperly.GFGround FaultOutput Ground FaultDrive output grounding current hasexceeded 50% of the Drive rated outputcurrent and L8-09 = 1 (enabled).Motor lead was shorted toground and/or a DCCT wasdefective.Remove the motor and run theDrive without the motor.Check the motor for a phase toground short.Check the output current with aclamp on meter to verify theDCCT reading.LFOutput Phase LossOutput Open-phaseAn open-phase occurred at the Drive outputThis fault is detected when output currenthas exceeded 5% imbalance and L8-07 = 1(enabled).There was a broken wire in theoutput cable.There was a broken wire in themotor winding.The output terminals wereloose.Check the wiring to the motor.Check the motor for phase toground short.The motor being used has acapacity less than 5% of theDrive’s maximum motorcapacity.Check the motor and Drivecapacity.Low impedance motor wasused. Add additional impedance.OCOver CurrentOvercurrentDrive output current exceeded theovercurrent detection level (approximately200% of Drive rated output current).Shorted Drive output phase tophase, shorted motor, lockedrotor, load too heavy, accel/decel time too short, contactoron the Drive output is openedor closed, a special motor or amotor with a FLA rating largerthan Drive rated outputcurrent.Remove the motor and run theDrive without the motor.Check the motor for a phase-to-phase short.Check the Drive for a phase-to-phase short at the output.Verify C1-01 and C1-02 are setcorrectly.Check load conditions.OHHeatsink OvertempHeatsink OverheatThe temperature of the Drive’s heatsinkexceeded the setting in L8-02 andL8-03 = 0 to 2.There was a heat sourcenearby.Check for dirt build-up on thefans and heatsink.The ambient temperature wastoo high.Reduce the ambient temperaturearound the Drive.