Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual page 75

Warnings and Alarms
Warnings / Alarm Messages
A warning or an alarm is signalled by the relevant LED on the front of the frequency converter and indi-
cated by a code on the display.
A warning remains active until its cause is no longer 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 frequency converter will have tripped. Alarms must be reset to restart
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 "Reset" function.
3. Via serial communication/optional fieldbus.
NB!
After 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, or the alarm is trip-
locked (see also table on following page).
Alarms that are trip-locked offer additional protection, meaning that the mains supply must be switched
off before the alarm can be reset. After being switched back on, the FC 300 is no longer blocked and 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 in parameters 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 that either
a warning occurs before an alarm, or else that you can specify whether it is a warning or an alarm that
is to be displayed for a given fault.
This is possible, for instance, in parameters 1-90 Motor Thermal Protection. After an alarm or trip, the
motor carries on coasting, and the alarm and warning flash. Once the problem has been rectified, only
the alarm continues flashing until the FC 300 is reset.
MG.33.A8.02 - VLT is a registered Danfoss trademark
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