9.2 Alarms and Warnings - Filter (left LCP)
NB!
This sections covers warnings and alarms on the filter side LCP. For warning and alarms for the frequency converter, please see previous
section
A warning or an alarm is signalled by the relevant LED on the front of the filter 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 unit may still be continued. Warning messages
may be critical, but are not necessarily so.
In the event of an alarm, the unit will have tripped. Alarms must be reset to restart operation once their cause has been rectified.
This may be done in four 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.
4. By resetting automatically using the [Auto Reset] function. See par. 14-20
Reset Mode
in theVLT Active Filter AAF 005 Manual
NB!
After a manual reset using the [RESET] button on the LCP, the [AUTO ON] or [HAND ON] button must be pressed to restart the unit.
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, means that the mains supply must be switched off before the alarm can be reset. After being
switched back on, the unit 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 par. 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 it can
be specified whether it is a warning or an alarm that is to be displayed for a given fault.
9 Troubleshooting
VLT AQUA Low Harmonic Drive Operating In-
structions
178 MG.20.T1.02 - VLT
®
is a registered Danfoss trademark
9
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