Danfoss VLT FC 102 Operating Instructions Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

Contents

Troubleshooting• Check the connections on the serial communi-cation cable.• Increase parameter 8-03 Control Word TimeoutTime• Check the operation of the communicationequipment.• Verify a proper installation based on EMCrequirements.WARNING/ALARM 22, Hoist mechanical brakeReport value shows what kind it is.0 = The torque reference was not reached before timeout(parameter 2-27 Torque Ramp Up Time).1 = Expected brake feedback not received before timeout(parameter 2-23 Activate Brake Delay, parameter 2-25 BrakeRelease Time).WARNING 23, Internal fan faultThe fan warning function is an extra protective functionthat checks if the fan is running/mounted. The fan warningcan be disabled in parameter 14-53 Fan Monitor ([0]Disabled).Troubleshooting• Check the fan resistance.• Check the soft charge fuses.WARNING 24, External fan faultThe fan warning function is an extra protective functionthat checks if the fan is running/mounted. The fan warningcan be disabled in parameter 14-53 Fan Monitor ([0]Disabled).Troubleshooting• Check the fan resistance.• Check the soft charge fuses.WARNING 25, Brake resistor short circuitThe brake resistor is monitored during operation. If a shortcircuit occurs, the brake function is disabled and thewarning appears. The frequency converter is stilloperational, but without the brake function.Troubleshooting• Remove the power to the frequency converterand replace the brake resistor (seeparameter 2-15 Brake Check).WARNING/ALARM 26, Brake resistor power limitThe power transmitted to the brake resistor is calculated asa mean value over the last 120 s of run time. Thecalculation is based on the intermediate circuit voltage andthe brake resistance value set in parameter 2-16 AC brakeMax. Current. The warning is active when the dissipatedbraking is >90% of the brake resistance power. If [2] Trip isselected in parameter 2-13 Brake Power Monitoring, thefrequency converter trips when the dissipated brakingpower reaches 100%.WARNINGIf the brake transistor is short-circuited, there is a risk ofsubstantial power being transmitted to the brakeresistor.WARNING/ALARM 27, Brake chopper faultThis alarm/warning could occur if the brake resistoroverheats. Terminals 104 and 106 are available as brakeresistors Klixon inputs.NOTICEThis signal feedback is used by LHD to monitor thetemperature of the HI inductor. This fault indicates thatKlixon opened on the HI inductor at the active filter side.WARNING/ALARM 28, Brake check failedThe brake resistor is not connected or not working.Check parameter 2-15 Brake Check.ALARM 29, Heat Sink tempThe maximum temperature of the heat sink has beenexceeded. The temperature fault resets when thetemperature falls below a defined heat sink temperature.The trip and reset points vary based on the frequencyconverter power size.TroubleshootingCheck for the following conditions.• Ambient temperature too high.• Motor cables too long.• Incorrect airflow clearance above and below thefrequency converter.• Blocked airflow around the frequency converter.• Damaged heat sink fan.• Dirty heat sink.For D, E, and F enclosures, this alarm is based on thetemperature measured by the heat sink sensor mountedinside the IGBT modules. For the F enclosures, the thermalsensor in the rectifier module can also cause this alarm.Troubleshooting• Check the fan resistance.• Check the soft charge fuses.• Check the IGBT thermal sensor.ALARM 30, Motor phase U missingMotor phase U between the frequency converter and themotor is missing.Troubleshooting• Remove the power from the frequency converterand check motor phase U.ALARM 31, Motor phase V missingMotor phase V between the frequency converter and themotor is missing.Diagnostics and Troubleshoo... VLT® HVAC Drive FC 102 Low Harmonic Drive70 Danfoss A/S © 04/2015 All rights reserved. MG16I30277