5 Troubleshooting
5.1.1 Warnings/Alarm Messages
A warning or an alarm is signaled by the relevant LED on the
front of the adjustable frequency drive 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
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 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 serial communi-
cation bus.
NOTE!
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 line power supply must be switched off
before the alarm can be reset. After being switched back on,
the adjustable frequency drive 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 are marked against a code in the table
on the following page, this means that either a warning
occurs before an alarm, or 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
adjustable frequency drive is reset.
Troubleshooting FC 300 Programming Guide
MG.33.MA.22 - VLT
®
is a registered Danfoss trademark 5-1
5
To Next Page
Loading...
Need help?
General