Danfoss VLT HVAC Drive FC 102 Operating Manual page 139

Operating Guide | VLT® HVAC Drive FC 102
9.3.30 ALARM 31 Motor Phase V Missing
Cause
Motor phase V between the drive and the motor is missing.
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 V.
9.3.31 ALARM 32 Motor Phase W Missing
Cause
Motor phase W between the drive and the motor is missing.
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.
9.3.32 ALARM 33, Inrush Fault
Cause
Too many power-ups have occurred within a short time period.
Troubleshooting
• Let the unit cool to operating temperature.
Danfoss A/S © 2018.10
W A R N I N G
W A R N I N G
Maintenance, Diagnostics, and
Troubleshooting
AQ262141314214en-000101 / 130R0880 | 139