Danfoss VLT FC 103, Programming Manual

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5 Troubleshooting
5.1.1 Alarms and Warnings
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 pressing [Reset].
2. Via a digital input with the “Reset” function.
3. Via serial communication/optional fieldbus.
4. By resetting automatically using the [Auto Reset]
function, see
14-20 Reset Mode .
NOTE
After a manual reset pressing [Reset], [Auto On] 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 5.1 ).
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
Table 5.1 , 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.
No. Description Warning Alarm/Trip Alarm/Trip Lock Parameter Reference
1 10 Volts low X
2 Live zero error (X) (X) 6-01
3 No motor (X) 1-80
4 Mains phase loss (X) (X) (X) 14-12
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) 1-90
11 Motor thermistor over temperature (X) (X) 1-90
12 Torque limit X X
13 Over Current X X X
14 Earth fault X X X
15 Incomp. HW X X
16 Short Circuit X X
17 Control word timeout (X) (X) 8-04
18 Start Failed
19 Discharge Temperature High
23 Internal fans
24 External fans
25 Brake resistor short-circuited X
26 Brake resistor power limit (X) (X) 2-13
Troubleshooting
VLT
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Refrigeration Drive Programming Guide
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