Danfoss VLT Flow Drive FC 111 Programming Manual page 199

VLT® Flow Drive FC 111
Programming Guide
If parameter 8-04 Control Word Timeout Function is set to [5] Stop and trip, a warning appears, and the drive ramps down to a stop
and shows an alarm.
Troubleshooting
• Check the connections on the serial communication cable.
•
Increase parameter 8-03 Control Word Timeout Time.
• Check the operation of the communication equipment.
• Verify that proper EMC installation was performed.
5.5.13 WARNING/ALARM 24, Fan Fault
Cause
The fan warning function is an extra protection function that checks whether the fan is running/mounted. The fan warning can be
disabled in parameter 14-53 Fan Monitor ([0] Disabled).
Troubleshooting
• Check fan resistance.
5.5.14 ALARM 30, Motor Phase U Missing
Cause
Motor phase U between the drive and the motor is missing.
Troubleshooting
• Turn off the drive and check motor phase U.
5.5.15 ALARM 31, Motor Phase V Missing
Cause
Motor phase V between the drive and the motor is missing.
Troubleshooting
• Turn off the drive and check motor phase V.
5.5.16 ALARM 32, Motor Phase W Missing
Cause
Motor phase W between the drive and the motor is missing.
Troubleshooting
• Turn off the drive and check motor phase W.
5.5.17 ALARM 38, Internal Fault
Cause
An internal fault occurs.
Troubleshooting
Contact your Danfoss supplier.
5.5.18 ALARM 44, Earth Fault II
Cause
There is a discharge from the output phases to ground, either in the cable between the drive and the motor or in the motor itself.
Troubleshooting
• Turn off the drive and remove the ground fault.
• Measure the resistance to ground of the motor cables and the motor with a megohmmeter to check for a ground fault in the
motor.
5.5.19 ALARM 46, Gate Drive Voltage Low
Cause
The supply on the power card is out of range. There are 3 supplies generated by the switch mode power supply (SMPS) on the
power card: 24 V, 5 V, and ±18 V.
Troubleshooting
• Check the power card.
Danfoss A/S © 2021.07
Troubleshooting
AU363928304090en-000101 / 130R0982 | 199