Troubleshooting; Warnings/Alarm Messages - Danfoss VLT AutomationDrive FC 300 Programming Manual

Troubleshooting

5 Troubleshooting

5.1.1 Warnings/Alarm Messages

A warning or an alarm is signalled by the relevant LED on the
front of the frequency converter and indicated 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
5 5
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.
2. Via a digital input with the "Reset" function.
3. Via serial communication/optional fieldbus.
NOTE
After a manual reset using the [RESET] button on the LCP,
the [AUTO ON] button must be pressed to restart the motor.
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FC 300 Programming Guide
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
frequency converter 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 14-20 Reset Mode (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 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
frequency converter is reset.
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