Troubleshooting; Warnings And Alarms; Alarms; Warnings - Danfoss VLT AutomationDrive FC 360 Programming Manual

Troubleshooting

6 Troubleshooting

6.1 Warnings and Alarms

When the frequency converter fault circuitry detects a fault
condition or a pending fault, a warning, or alarm is issued.
A flashing display on the LCP indicates an alarm or
warning condition and the associated number code on line
2. Sometimes a warning precedes an alarm.

6.1.1 Alarms

An alarm causes the frequency converter to trip (suspend
6 6
operation). The frequency converter has 3 trip conditions
which are displayed in line 1:
TRIP (AUTO RESTART): The frequency converter is
programmed to restart automatically after the fault is
removed. The number of automatic reset attempts can be
continuous or limited to a programmed number of
attempts. If the selected number of automatic reset
attempts is exceeded, the trip condition changes to TRIP
(RESET).
TRIP (RESET): Requires resetting of the frequency converter
before operation after a fault is cleared. Press [Reset] to
reset the frequency converter manually, or use a digital
input, or a serial bus command. For FC 360 frequency
converters, the stop and reset are the same key. If [Stop/
Reset] is used to reset the frequency converter, press
[Start] to initiate a run command in either local or remote.
TRIPLOCK (DISC>MAINS): Disconnect the mains AC input
power to the frequency converter long enough for the
display to go blank. Remove the fault condition and
reapply power. Following power-up, the fault indication
changes to TRIP (RESET) and allows for manual, digital, or
serial bus reset.
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Programming Guide

6.1.2 Warnings

During a warning, the frequency converter remains
operational, although the warning flashes for as long as
the condition exists. The frequency converter may,
however, reduce the warning condition. For example, if the
warning displayed was Torque Limit (Warning 12), the
frequency converter would be reducing speed to
compensate for the overcurrent condition. In some cases, if
the condition is not corrected or worsens, an alarm
condition is activated and the frequency converter output
to the motor terminated. Line 1 identifies the warning in
plain language and line 2 identifies the warning number.

6.1.3 Warning/Alarm Messages

The LEDs on the front of the frequency converter and a
code in the display signal a warning or an alarm.
LED indication
Warning
Alarm
Table 6.1 Control Terminals and Associated Parameter
A warning indicates a condition that may require attention
or a trend that may eventually require attention. A
warning remains active until the cause is no longer
present. Under some circumstances, motor operation may
continue.
A trip is the action when an alarm has appeared. The trip
removes power to the motor. It can be reset after the
condition has been cleared by pressing [Reset], or through
a digital input (parameter group 5–1* Digital Inputs). The
event that caused an alarm cannot damage the frequency
converter or cause a dangerous condition. Alarms must be
reset to restart operation once their cause has been
rectified.
The reset can be done in 3 ways:
Danfoss A/S © Rev. 2014-03-31 All rights reserved.
Yellow
Flashing red
•
Press [Reset]
•
A digital reset input
•
Serial communication/optional fieldbus reset
signal
MG06C402