Danfoss VLT Decentral Drive FCD 302 Operating Manual page 51

VLT® Decentral Drive FCD 302
Operating Guide
Troubleshooting
HIGH VOLTAGE
AC drives contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to perform installation,
start-up, and maintenance by qualified personnel can result in death or serious injury.
-
Only qualified personnel must perform installation, start-up, and maintenance.
• Disconnect power before proceeding.
• Remove the power from the drive and check motor phase W.
6.8.24 ALARM 33, Inrush Fault
Cause
Too many power-ups have occurred within a short time period.
Troubleshooting
• Let the unit cool to operating temperature.
• Check potential DC-link fault to ground.
6.8.25 WARNING/ALARM 34, Fieldbus Communication Fault
Cause
The fieldbus on the communication option card is not working.
6.8.26 WARNING/ALARM 36, Mains Failure
Cause
This warning/alarm is only active if the supply voltage to the drive is lost and parameter 14-10 Mains Failure is not set to [0] No Func-
tion.
Troubleshooting
• Check the fuses to the drive and mains supply to the unit.
6.8.27 ALARM 37, Phase Imbalance
Cause
There is a current imbalance between the power units.
6.8.28 ALARM 39, Heat Sink Sensor
Cause
No feedback from the heat sink temperature sensor.
The signal from the IGBT thermal sensor is not available on the power card. The problem could be on the power card, on the gate-
drive card, or on the ribboncable between the power card and the gatedrive card.
6.8.29 WARNING 40, Overload of Digital Output Terminal 27
Troubleshooting
• Check the load connected to terminal 27 or remove the short-circuit connection.
•
Check parameter 5-00 Digital I/O Mode and parameter 5-01 Terminal 27 Mode.
6.8.30 WARNING 41, Overload of Digital Output Terminal 29
Troubleshooting
• Check the load connected to terminal 29 or remove the short-circuit connection.
• Check parameter 5-00 Digital I/O Mode and parameter 5-02 Terminal 29 Mode.
6.8.31 WARNING 42, Ovrld X30/6-7
Troubleshooting
For terminal X30/6:
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W A R N I N G
Maintenance, Diagnostics and
Troubleshooting
AQ267036816112EN-000101 / 130R0208 | 51