11 Warnings and Alarms
11.1 Status Messages
11.1.1 Warnings/Alarm Messages
The LEDs on the LCP signals a warning or an alarm. A code
in the display is also shown.
A warning remains active until its cause is no longer
present. Under certain circumstances, operation of the
motor can still be continued. Warning messages are not
necessarily critical.
An alarm makes the frequency converter trip. Alarms must
be reset to restart operation once their cause has been
rectified.
Three ways of resetting alarms
•
By pressing [Reset]
•
Via a digital input with the “Reset” function
•
Via serial communication/optional fieldbus
NOTICE
After a manual reset pressing [Reset], the [Auto On] key
must be pressed to restart the motor.
If an alarm cannot be reset, the reason could be that its
cause has not been rectified, or the alarm is trip-locked
(see also Table 11.1).
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, 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 or alarm is marked against a code in
Table 11.1, this means that either a warning occurs before
an alarm, or that it is possible to specify whether it is a
warning or an alarm that is 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. Once the
problem has been rectified, only the alarm continues
flashing until the frequency converter is reset.
11.1.2
Alarm List
No. Description Warning Alarm/trip Alarm/trip lock Parameter reference
1 10 V low X
2 Live zero error (X) (X)
6-01 Live Zero Timeout Function
3 No motor (X)
1-80 Function at Stop
4 Mains phase loss (X) (X) (X)
14-12 Function 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)
1-90 Motor Thermal Protection
11 Motor thermistor over temperature (X) (X)
1-90 Motor Thermal Protection
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 time-out (X) (X)
Parameter 8-04 Control Timeout
Function
Warnings and Alarms Operating Instructions
MG90U302 Danfoss A/S © Rev. 2014-02-27 All rights reserved. 69
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