Danfoss VLT AQUA Drive FC 202 Design Manual

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

Contents

when the motor is overloaded by more than 100% for toolong.Troubleshooting• Check for motor overheating.• Check if the motor is mechanically overloaded.• Check that the motor current set in 1-24 MotorCurrent is correct.• Ensure that motor data in parameters 1-20through 1-25 are set correctly.• If an external fan is in use, check in 1-91 MotorExternal Fan that it is selected.• Run AMA in 1-29 Automatic Motor Adaptation(AMA) tune the frequency converter to the motormore accurately and reduce thermal loading.WARNING/ALARM 11, Motor thermistor overtempThe thermistor might be disconnected. Select whether thefrequency converter gives a warning or an alarm in1-90 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 (analogue voltage input) andterminal 50 (+10 V supply) and that the terminalswitch for 53 or 54 is set for voltage. Check that1-93 Thermistor Source selects terminal 53 or 54.• When using digital inputs 18 or 19, check thatthe thermistor is connected correctly betweeneither terminal 18 or 19 (digital input PNP only)and terminal 50. Check 1-93 Thermistor Sourceselects terminal 18 or 19.WARNING/ALARM 12, Torque limitThe torque has exceeded the value in 4-16 Torque LimitMotor Mode or the value in 4-17 Torque Limit GeneratorMode. 14-25 Trip Delay at Torque Limit can change this froma warning only condition to a warning followed by analarm.Troubleshooting• If the motor torque limit is exceeded during rampup, 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, possiblyincrease the torque limit. Be sure 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 about 1.5 s,then the frequency converter trips and issues an alarm.This fault may be caused by shock loading or fastacceleration with high inertia loads. If extended mechanicalbrake control is selected, trip can be reset externally.Troubleshooting• Remove power and check if the motor shaft canbe turned.• Check that the motor size matches the frequencyconverter.• Check parameters 1-20 through 1-25 for correctmotor data.ALARM 14, Earth (ground) faultThere is current from the output phases to earth, either inthe cable between the frequency converter and the motoror in the motor itself.Troubleshooting• Remove power to the frequency converter andrepair the earth fault.• Check for earth faults in the motor by measuringthe resistance to ground of the motor leads andthe motor with a megohmmeter.ALARM 15, Hardware mismatchA fitted option is not operational with the present controlboard hardware or software.Record the value of the following parameters and contactDanfoss.• 15-40 FC Type• 15-41 Power Section• 15-42 Voltage• 15-43 Software Version• 15-45 Actual Typecode String• 15-49 SW ID Control Card• 15-50 SW ID Power Card• 15-60 Option Mounted• 15-61 Option SW Version (for each option slot)ALARM 16, Short circuitThere is short-circuiting in the motor or motor wiring.Remove power to the frequency converter and repair theshort circuit.WARNING/ALARM 17, Control word timeoutThere is no communication to the frequency converter.The warning is only active when 8-04 Control TimeoutFunction is not set to OFF.If 8-04 Control Timeout Function is set to Stop and Trip, awarning appears and the frequency converter ramps downuntil it stops then displays an alarm.General Specifications and ... Design GuideMG20Z202 Danfoss A/S © Rev. 06/2014 All rights reserved. 1978 8