Danfoss VLT FCD 302 Operating Manual page 47

Operating Guide | VLT® Decentral Drive FCD 302
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 drive trips. To resume operation, reset the alarm after the cause is rectified.
Resetting options:
Press [Reset].
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Via a digital input with the reset function.
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Via serial communication/optional fieldbus.
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After a manual reset pressing [Reset], press [Auto On] 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 in status trip lock.
Alarms that are in status trip lock offer extra protection, meaning that the mains supply must be switched off before the alarm can be
reset. After being switched back on, the drive is no longer blocked and can be reset once the cause has been rectified.
Alarms that are not in status trip lock can also be reset using the automatic reset function in parameter 14–20 Reset Mode (Warning:
Automatic wake-up is possible.)
If a warning or alarm is marked against a code in the alarm/warning code list, this means that either a warning occurs before an alarm.
Alternatively, it is possible to specify whether a warning or an alarm is shown 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. Once the problem has been rectified, only the alarm continues flashing until the drive is reset.
No missing motor phase detection (numbers 30–32) and no stall detection are active when parameter 1–10 Motor Construction is
set to [1] PM non-salient SPM.
6.9.2 Warning and Alarm Codes
WARNING/ALARM 4, Mains Phase Loss
Cause
A phase is missing on the supply side, or the mains voltage imbalance is too high. This message also appears for a fault in the input
rectifier. Options are programmed in parameter 14-12 Response to Mains Imbalance.
Troubleshooting
Check the supply voltage and supply currents to the drive.
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Warning 5, DC Link Voltage High
Cause
The DC-link voltage (DC) is higher than the high-voltage warning limit. The limit depends on the drive voltage rating. The unit is still
active.
Warning 6, DC Link Voltage Low
Cause
The DC-link voltage (DC) is lower than the low-voltage warning limit. The limit depends on the drive voltage rating. The unit is still active.
WARNING/ALARM 9, Inverter Overload
Cause
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AQ267036816112en-000301 / 130R0208 | 47