Troubleshooting - Danfoss VLT Series Programming Manual

Troubleshooting

4 Troubleshooting
A warning or an alarm is signalled 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 will have
tripped. Alarms must be reset to restart operation once
their cause has been rectified.
This may be done in four ways:
1. By using the [RESET] control button on the LCP.
2. Via a digital input with the "Reset" function.
3. Via serial communication/optional fieldbus.
4. By resetting automatically using the [Auto Reset]
function, which is a default setting for VLT
Drive Drive, see 14-20 Reset Mode in the FC 100
Programming Guide
NOTE
After a manual reset using the [RESET] button on the LCP,
the [AUTO ON] or [HAND ON] button must be pressed 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 table on following page).
No. Description
1 10 Volts low
2 Live zero error
3 No motor
4 Mains phase loss
5 DC link voltage high
6 DC link voltage low
7 DC over voltage
8 DC under voltage
9 Inverter overloaded
10 Motor ETR over temperature
11 Motor thermistor over temperature
12 Torque limit
13 Over Current
14 Earth fault
15 Hardware mismatch
16 Short Circuit
17 Control word timeout
®
VLT HVAC Drive Programming Guide
Alarms that are trip-locked offer additional protection,
means 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 may 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 14-20 Reset Mode (Warning:
automatic wake-up is possible!)
If a warning and alarm is marked against a code in the
table on the following page, this means that either a
warning occurs before an alarm, or it can be specified
whether it is a warning or an alarm that is to be displayed
for a given fault.
This is possible, for instance, in 1-90 Motor Thermal
Protection. After an alarm or trip, the motor carries on
coasting, and the alarm and warning flash on the
frequency converter. Once the problem has been rectified,
only the alarm continues flashing.
®
HVAC
NOTE
No missing motorphase detection (no 30-32) and no stall
detection is active when 1-10 Motor Construction is set to
[1] PM non salient SPM.
Warning
X
(X)
(X)
(X)
X
X
X
X
X
(X)
(X)
X
X
X
(X)
®
MG.11.CC.02 - VLT is a registered Danfoss trademark
CAUTION
Alarm/ Alarm/Trip Lock
Trip
(X)
(X) (X)
X
X
X
(X)
(X)
X
X X
X X
X X
X X
(X)
4
Parameter Reference
6-01
1-80
14-12
1-90
1-90
8-04
193
4