7 Troubleshooting
7.1 Status Messages
7.1.1 Warnings/Alarm Messages
A warning or an alarm is signaled by the relevant LED on
the front of the frequency converter and indicated by a
code on the display.
A warning remains active until its cause is no longer
present. Under certain circumstances, operation of the
motor may still be continued. Warning messages may be
critical, but are not necessarily so.
In the event of an alarm, the frequency converter trips.
Reset the alarm to resume operation once the cause has
been rectified.
Three ways to reset:
•
Press [Reset].
•
Via a digital input with the “Reset” function.
•
Via serial communication/optional fieldbus.
NOTICE!
After a manual reset pressing [Reset], press [Auto On] to
restart the motor.
If an alarm cannot be reset, the reason may be that its
cause has not been rectified, or the alarm is trip-locked
(see also
Alarms that are trip-locked offer additional protection,
meaning that the mains supply must be switched off
before the alarm can be reset. After being switched back
on, the frequency converter is no longer blocked and can
be reset as described above once the cause has been
rectified.
Alarms that are not trip-locked can also be reset using the
automatic reset function in
parameter 14-20 Reset Mode
(Warning: automatic wake-up is possible!)
If a warning or alarm is marked against a code in
,
this means that either a warning occurs before an alarm, or
else that it is possible to specify whether a warning or an
alarm should be displayed for a given fault.
This is possible, for instance, in
parameter 1-90 Motor
Thermal Protection
. After an alarm or trip, the motor carries
on coasting, and the alarm and warning flash. Once the
problem has been rectified, only the alarm continues
flashing until the frequency converter is reset.
NOTICE!
No missing motor phase detection (numbers 30-32) and
no stall detection is active when
parameter 1-10 Motor
Construction
is set to
[1] PM non salient SPM
.
No.
Description
Warning
Alarm/Trip
Alarm/Trip Lock
Parameter
Reference
1
10 Volts low
X
2
Live zero error
(X)
(X)
Parameter 6-01 Live
Zero Timeout Function
3
No motor
(X)
Parameter 1-80 Functio
n at Stop
4
Mains phase loss
(X)
(X)
(X)
Parameter 14-12 Functi
on at Mains Imbalance
5
DC link voltage high
X
6
DC link voltage low
X
7
DC over-voltage
X
X
8
DC under voltage
X
X
9
Inverter overloaded
X
X
10
Motor ETR over temperature
(X)
(X)
Parameter 1-90 Motor
Thermal Protection
Troubleshooting
Operating Instructions
MG34M422
Danfoss A/S © Rev. 2013-07-03 All rights reserved.
147
7
7
Summary of Contents for VLT CDS 303
Page 2: ......
