Warnings And Alarms; System Monitoring; Warning And Alarm Types; Warning And Alarm Displays - Danfoss VLT AutomationDrive Operating Instructions Manual

Warnings and Alarms

8 Warnings and Alarms

8.1 System Monitoring

The frequency converter monitors the condition of its input
power, output, and motor factors as well as other system
performance indicators. A warning or alarm may not
necessarily indicate a problem internal to the frequency
converter itself. In many cases it indicates failure conditions
from input voltage, motor load or temperature, external
signals, or other areas monitored by the frequency
converter's internal logic. Be sure to investigate those areas
exterior to the frequency converter as indicated in the alarm
or warning.

8.2 Warning and Alarm Types

Warnings
A warning is issued when an alarm condition is impending or
when an abnormal operating condition is present and may
result in the frequency converter issuing an alarm. A warning
clears by itself when the abnormal condition is removed.
Alarms
Trip
An alarm is issued when the frequency converter is tripped,
that is, the frequency converter suspends operation to
prevent frequency converter or system damage. The motor
will coast to a stop. The frequency converter logic will
continue to operate and monitor the frequency converter
status. After the fault condition is remedied, the frequency
converter can be reset. It will then be ready to start operation
again.
A trip can be reset in any of 4 ways:
•
Press [RESET] on the LCP
•
Digital reset input command
•
Serial communication reset input command
•
Auto reset
Trip-lock
An alarm that causes the frequency converter to trip-lock
requires that input power be cycled. The motor will coast to
a stop. The frequency converter logic will continue to
operate and monitor the frequency converter status.
Remove input power to the frequency converter and correct
the cause of the fault, then restore power. This action puts
the frequency converter into a trip condition as described
above and may be reset in any of those 4 ways.
®
VLT AutomationDrive Operating
Instructions

8.3 Warning and Alarm Displays

An alarm or trip-lock alarm will flash on display along with
the alarm number.
In addition to the text and alarm code on the frequency
converter display, the status indicator lights operate.
Warning
Alarm
Trip-Lock
®
MG.33.AJ.02 - VLT is a registered Danfoss trademark
Warn. LED Alarm LED
ON OFF
OFF ON (Flashing)
ON ON (Flashing)
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