FC 300 Operating Instructions
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 indicated by a code on the display.
A warning remains active until its cause is no longer present. Under certain circumsta nc es operation of the
motor may still be continue d. Warning messages may be critical, but ar e 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 rectifie
d. This may be done in three ways:
1. By using the [RESET] control button on the LCP c ontrol panel.
2. Via a digital input with the “Reset” function.
3. Via serial communication/op tional field
bus.
NB!:
After a manual reset using the [RESET] button on the LCP, the [ AUTO ON]
button mus t be pressed to restart the m otor.
If an alarm cannot be reset, the reason may be that its cause has not been rec tified, 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 b efore the alarm can be reset. A fter being switched back on, the FC 300 is no longer
blocked and may be reset as described above once the ca use 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 alar m, 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 p ossible, for instance, in parameters 1-90 Motor Thermal Prot ection. After an alarm or
trip, the m o tor carries on coasting, and the alarm and warning flash on the FC 300. Once the
problem has been rectified, only the alarm continues flashing.
73
MG.33.A7.02 - VLT is a registered Danfoss trademark
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