8 Warnings and Alarms
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.
If an alarm occurs, the frequency converter trips. Alarms
must be reset to restart operation once their cause has
been rectified.
This may be done in 4 ways:
1. Pressing [Reset] 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 (default)
NOTICE
After a manual reset pressing [Reset], the [Auto On] or
[Hand 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 8.1).
CAUTION
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 parameter 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 Hardware mismatch X X
16 Short Circuit X X
17 Control word timeout (X) (X) 8-04
23 Internal Fan Fault X
24 External Fan Fault X 14-53
25 Brake resistor short-circuited X
Warnings and Alarms VLT HVAC Drive FC 102 Operating Instructions
MG11F402 - Rev. 2013-12-16 129
8 8
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