FC 300 Design GuideTroubleshooting" Warnings/Alarm MessagesA warning or an alarm is signaled by the relevant LED on the front of the adjustable frequencydrive and indicated by a code on the display. A warning remains active until its cause is nolonger present. Under certain circumstances operation of the motor may still be continued.Warning messages may be critical, but are not necessarily so.In the event of an alarm, the adjustable frequency drive will have tripped. Alarms must be reset torestart operation once their cause has been rectified. This may be done in three ways:1. By using the [RESET] control button on the LCP control panel.2. Via a digital input with the ìResetî function.3. Via serial communication/optional bus.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 cause has not been rectified, orthe alarm is trip-locked (see also table on following page).Alarms that are trip-locked offer additional protection, meaning that the line supply must be switchedoff before the alarm can be reset. After being switched back on, the FC 100 is no longer blockedand may be reset as described above once the cause has been rectified.Alarms that are not trip-locked can also be reset using the automatic reset function inparameters 14-20 (Warning: automatic wake-up is possible!)If a warning and alarm is marked against a code in the table on the following page, this means thateither a warning occurs before an alarm, or else that you can specify whether it is a warning or an alarmthat is to be displayed for a given fault. This is possible, for instance, in parameters 1-90 Motor ThermalProtection. After an alarm or trip, the motor carries on coasting, and the alarm and warning flash onthe FC 100. Once the problem has been rectified, only the alarm continues flashing.297MG.33.B6.22 - VLT is a registered Danfoss trademark
