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

Select 1 of these options:• The drive issues a warning or an alarm when thecounter is >90% if parameter 1-90 Motor ThermalProtection is set to warning options.• The drive trips when the counter reaches 100% ifparameter 1-90 Motor Thermal Protection is set totrip options.The fault occurs when the motor runs with more than100% overload for too long.Troubleshooting• Check for motor overheating.• Check if the motor is mechanically overloaded.• Check that the motor current set inparameter 1-24 Motor Current is correct.• Ensure that the motor data in parameters 1-20 to1-25 is set correctly.• If an external fan is in use, check that it isselected in parameter 1-91 Motor External Fan.• Running AMA in parameter 1-29 Automatic MotorAdaptation (AMA) tunes the drive to the motormore accurately and reduces thermal loading.WARNING/ALARM 11, Motor thermistor overtempCheck whether the thermistor is disconnected. Selectwhether the drive issues a warning or an alarm inparameter 1-90 Motor Thermal Protection.Troubleshooting• Check for motor overheating.• Check if the motor is mechanically overloaded.• When using terminal 53 or 54, check that thethermistor is connected correctly between eitherterminal 53 or 54 (analog voltage input) andterminal 50 (+10 V supply). Also check that theterminal switch for 53 or 54 is set for voltage.Check that parameter 1-93 Thermistor Sourceselects terminal 53 or 54.• When using terminal 18, 19, 31, 32, or 33 (digitalinputs), check that the thermistor is connectedcorrectly between the digital input terminal used(digital input PNP only) and terminal 50. Selectthe terminal to use in parameter 1-93 ThermistorSource.WARNING/ALARM 12, Torque limitThe torque has exceeded the value inparameter 4-16 Torque Limit Motor Mode or the value inparameter 4-17 Torque Limit Generator Mode.Parameter 14-25 Trip Delay at Torque Limit can change thiswarning from a warning-only condition to a warningfollowed by an alarm.Troubleshooting• If the motor torque limit is exceeded duringramp-up, extend the ramp-up time.• If the generator torque limit is exceeded duringramp-down, extend the ramp-down time.• If torque limit occurs while running, increase thetorque limit. Make sure that the system canoperate safely at a higher torque.• Check the application for excessive current drawon the motor.WARNING/ALARM 13, Over currentThe inverter peak current limit (approximately 200% of therated current) is exceeded. The warning lasts approximately1.5 s, then the drive trips and issues an alarm. Shockloading or quick acceleration with high-inertia loads cancause this fault. If the acceleration during ramp-up is quick,the fault can also appear after kinetic back-up.If extended mechanical brake control is selected, a trip canbe reset externally.Troubleshooting• Remove the power and check if the motor shaftcan be turned.• Check that the motor size matches the drive.• Check that the motor data is correct inparameters 1-20 to 1-25.ALARM 14, Earth (ground) faultThere is current from the output phase to ground, either inthe cable between the drive and the motor, or in themotor itself. The current transducers detect the groundfault by measuring current going out from the drive andcurrent going into the drive from the motor. Ground faultis issued if the deviation of the 2 currents is too large. Thecurrent going out of the drive must be the same as thecurrent going into the drive.Troubleshooting• Remove power to the drive and repair the groundfault.• Check for ground faults in the motor bymeasuring the resistance to ground of the motorcables and the motor with a megohmmeter.• Reset any potential individual offset in the 3current transducers in the drive. Perform themanual initialization or perform a complete AMA.This method is most relevant after changing thepower card.ALARM 15, Hardware mismatchA fitted option is not operational with the present controlcard hardware or software.Record the value of the following parameters and contactDanfoss.• Parameter 15-40 FC Type.• Parameter 15-41 Power Section.Maintenance, Diagnostics, a... Operating GuideMG21A502 Danfoss A/S © 09/2018 All rights reserved. 879 9