Danfoss vlt FC 102 Operating Guide

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7.6.27 ALARM 30, Motor Phase U Missing
Cause
Motor phase U between the drive and the motor is missing.
Troubleshooting
W A R N I N G
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 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 U.
7.6.28 ALARM 31, Motor Phase V Missing
Cause
Motor phase V between the drive and the motor is missing.
Troubleshooting
W A R N I N G
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 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.
7.6.29 ALARM 32, Motor Phase W Missing
Cause
Motor phase W between the drive and the motor is missing.
Troubleshooting
W A R N I N G
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 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.
7.6.30 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.
7.6.31 WARNING/ALARM 34, Fieldbus Communication Fault
Cause
The fieldbus on the communication option card is not working.
AQ267037536117en-000101 / 130R0083 | 73Danfoss A/S © 2023.09
Diagnostics and Troubleshooting
VLT HVAC Drive FC 102
Operating Guide

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English