8 Troubleshooting
8.1 Alarms and Warnings
A warning or an alarm is signaled by the relevant LED on the front of the adjustable frequency drive 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 adjustable frequency drive 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 keypad.
2.
Via a digital input with the “Reset” function.
3.
Via serial communication/optional network.
4.
By resetting automatically using the [Auto Reset] function, which is a default setting for AF-600 FP Drive, see
14-20 Reset Mode
in
AF-600 FP Programming Guide
After a manual reset using the [RESET] button on the LCP, the [AUTO] or [HAND] 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).
Alarms that are trip-locked offer additional protection, means that the line power supply must be switched off before the
alarm can be reset. After being switched back on, the adjustable frequency drive 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 adjustable frequency drive. Once the problem has been rectified, only the alarm continues
flashing.
Troubleshooting
VLT AQUA 12-Pulse High Power Instruction Manual
MG.20.Y1.22 - VLT
®
is a registered Danfoss trademark
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