Warnings And Alarms; System Monitoring; Warning And Alarm Types; Warnings - Danfoss VLT FC 103 Operating Instructions Manual

Warnings and Alarms

9 Warnings and Alarms

9.1 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.

9.2 Warning and Alarm Types

9.2.1 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 itself when the abnormal condition is
removed.

9.2.2 Alarm 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 coasts to a stop. The frequency
converter logic continues to operate and monitor the
frequency converter status. After the fault condition is
corrected, the frequency converter can be reset. It is then
ready to start operation again.
A trip can be reset in any of 4 ways:
•
Pressing [Reset]
•
Digital reset input command
•
Serial communication reset input command
•
Auto reset

9.2.3 Alarm Trip-lock

An alarm that causes the frequency converter to trip-lock
requires that input power is cycled. The motor coasts to a
stop. The frequency converter logic continues 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.
MG16J202
Operating Instructions

9.3 Warning and Alarm Displays

Illustration 9.1 Warning Display Example
An alarm or trip-lock alarm flashes in the display along
with the alarm number.
Illustration 9.2 Alarm Display Example
In addition to the text and alarm code on the frequency
converter display, there are 3 status indicator lights.
Warning
Alarm
Trip-Lock
Illustration 9.3 Indicator Lights
Danfoss A/S © Rev. 05/2014 All rights reserved.
Status
0.0Hz 0.000psi
0.0Hz
1:0 - Off
!Live zero error [W2]
Off Remote Stop
Status
0.0Hz 0.000kW
0.0Hz
0
Earth Fault [A14]
Auto Remote Trip
On
OK
Warn.
Alarm
Warn. LED Alarm LED
ON OFF
OFF ON (Flashing)
ON ON (Flashing)
!1(1)
0.00A
1(1)
0.00A
9 9
2
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