Warnings And Alarms; System Monitoring; Warning And Alarm Types; Warnings - Danfoss VLT AutomationDrive FC 302 Instruction Manual

Warnings and Alarms

9 Warnings and Alarms

9.1 System Monitoring

The adjustable frequency drive monitors the condition of
its input power, output, and motor factors as well as other
system performance indicators. A warning or alarm does
not necessarily indicate a problem internal to the
adjustable frequency drive itself. In many cases, it indicates
failure conditions from:
•
input voltage
•
motor load
•
motor temperature
•
external signals
•
other areas monitored by internal logic
Investigate 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 adjustable frequency drive issuing an
alarm. A warning clears by itself when the abnormal
condition is removed.

9.2.2 Alarm Trip

An alarm is issued when the adjustable frequency drive is
tripped, that is, the adjustable frequency drive suspends
operation to prevent adjustable frequency drive or system
damage. The motor coasts to a stop. The adjustable
frequency drive logic continues to operate and monitor
the adjustable frequency drive status. After the fault
condition is remedied, the adjustable frequency drive can
be reset. It is then ready to start operation again.
A trip can be reset in any of four ways:
•
Press [Reset] on the LCP
•
Digital reset input command
•
Serial communication reset input command
•
Auto reset
MG37A222
Instruction Manual

9.2.3 Alarm Trip Lock

An alarm that causes the adjustable frequency drive to
trip-lock requires that input power be cycled. The motor
coasts to a stop. The adjustable frequency drive logic
continues to operate and monitor the adjustable frequency
drive status. Remove input power to the adjustable
frequency drive and correct the cause of the fault, then
restore power. This action puts the adjustable frequency
drive into a trip condition as described in
chapter 9.2.2 Alarm Trip and may be reset in any of the
four ways.

9.3 Warning and Alarm Displays

Figure 9.1 Warning Display
An alarm or trip-lock alarm flashes on display along with
the alarm number.
Figure 9.2 Alarm Display
In addition to the text and alarm code on the adjustable
frequency drive LCP, there are three status indicator lights.
Danfoss A/S © Rev. 2014-02-07 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
!1(1)
0.00A
9 9
1(1)
0.00A
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