Warnings And Alarms; System Monitoring; Warning And Alarm Types; Warning And Alarm Displays - Danfoss VLT AutomationDrive FC 303 Instruction Manual

Warnings and Alarms

8 Warnings and Alarms

8.1 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 may
not necessarily indicate a problem internal to the
Adjustable frequency drive itself. In many cases it indicates
failure conditions from input voltage, motor load or
temperature, external signals, or other areas monitored by
the adjustable frequency drive's internal logic. Be sure to
investigate those areas exterior to the Adjustable
frequency drive 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 Adjustable frequency drive issuing an
alarm. A warning clears by itself when the abnormal
condition is removed.
Alarms
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 will coast to a stop. The Adjustable
frequency drive logic will continue to operate and monitor
the Adjustable frequency drive status. After the fault
condition is remedied, the Adjustable frequency drive 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 Adjustable frequency drive to
trip-lock requires that input power be cycled. The motor
will coast to a stop. The Adjustable frequency drive logic
will continue 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 above
and may be reset in any of those four ways.
VLT ® AutomationDrive Instruction
Manual

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 Adjustable
frequency drive display, the status indicator lights operate.
Warning
Alarm
Trip Lock
®
MG.33.AI.22 - VLT is a registered Danfoss trademark
Status
0.0Hz 0.000psi
0.0Hz
1:0 - Off
!Live zero error [W2]
Off Remote Stop
Status
0.0Hz 0.000kW
Earth Fault [A14]
Auto Remote Trip
OK
On
Warn.
Alarm
Hand Auto
Off
on on
Warn. LED
ON OFF
OFF ON (Flashing)
ON ON (Flashing)
!1(1)
0.00A
1(1)
0.00A
0.0Hz
0
8
Reset
Alarm LED
8-1
8