Danfoss VLT AutomationDrive FC 301 Operating Manual page 50

VLT® AutomationDrive FC 301/FC 302
Operating Guide
7.4.28 ALARM 30, Motor Phase U Missing
Cause
Motor phase U between the drive and the motor is missing.
Troubleshooting
HAZARDOUS VOLTAGE
AC drives contain hazardous voltage when connected to the AC mains or connected on the DC terminals. Failure to perform
installation, start-up, and maintenance by skilled personnel can result in death or serious injury.
-
Only skilled personnel must perform installation, start-up, and maintenance.
• Disconnect power before proceeding.
• Remove the power from the drive and check motor phase U.
7.4.29 ALARM 31, Motor Phase V Missing
Cause
Motor phase V between the drive and the motor is missing.
Troubleshooting
HAZARDOUS VOLTAGE
AC drives contain hazardous voltage when connected to the AC mains or connected on the DC terminals. Failure to perform
installation, start-up, and maintenance by skilled personnel can result in death or serious injury.
-
Only skilled personnel must perform installation, start-up, and maintenance.
• Disconnect power before proceeding.
• Remove the power from the drive and check motor phase V.
7.4.30 ALARM 32, Motor Phase W Missing
Cause
Motor phase W between the drive and the motor is missing.
Troubleshooting
HAZARDOUS VOLTAGE
AC drives contain hazardous voltage when connected to the AC mains or connected on the DC terminals. Failure to perform
installation, start-up, and maintenance by skilled personnel can result in death or serious injury.
-
Only skilled personnel must perform installation, start-up, and maintenance.
• Disconnect power before proceeding.
• Remove the power from the drive and check motor phase W.
7.4.31 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.
7.4.32 WARNING/ALARM 34, Fieldbus Communication Fault
Cause
The fieldbus on the communication option card is not working.
50 | Danfoss A/S © 2021.01
W A R N I N G
W A R N I N G
W A R N I N G
Maintenance, Diagnostics, and
Troubleshooting
AQ267037727118en-000101 / 130R0300