Danfoss VLT AutomationDrive FC 300 Programming Manual

Also see for VLT AutomationDrive FC 300: Instruction manual Operating instructions Design guide Service manual Operating instructions

Contents

Danfoss VLT AutomationDrive FC 300 Programming Manual Manual pdf 203 page image

5 Troubleshooting5.1.1 Warnings/Alarm MessagesA warning or an alarm is signalled by the relevant LED on thefront of the frequency converter and indicated by a code onthe display.A warning remains active until its cause is no longer present.Under certain circumstances operation of the motor may stillbe continued. Warning messages may be critical, but are notnecessarily so.In the event of an alarm, the frequency converter will havetripped. Alarms must be reset to restart operation once theircause has been rectified.This may be done in three ways:1. By using the [RESET] control button on the LCP.2. Via a digital input with the “Reset” function.3. Via serial communication/optional fieldbus.NOTEAfter a manual reset using the [RESET] button on the LCP,the [AUTO ON] button must be pressed to restart the motor.If an alarm cannot be reset, the reason may be that its causehas not been rectified, or the alarm is trip-locked (see alsotable on following page).Alarms that are trip-locked offer additional protection,meaning that the mains supply must be switched off beforethe alarm can be reset. After being switched back on, thefrequency converter is no longer blocked and may be resetas described above once the cause has been rectified.Alarms that are not trip-locked can also be reset using theautomatic reset function in 14-20 Reset Mode (Warning:automatic wake-up is possible!)If a warning and alarm is marked against a code in the tableon the following page, this means that either a warningoccurs before an alarm, or else that you can specify whetherit is a warning or an alarm that is to be displayed for a givenfault.This is possible, for instance, in 1-90 Motor Thermal Protection.After an alarm or trip, the motor carries on coasting, and thealarm and warning flash. Once the problem has beenrectified, only the alarm continues flashing until thefrequency converter is reset.Troubleshooting FC 300 Programming Guide202 MG.33.MB.02 - VLT® is a registered Danfoss trademark55