Danfoss VLT OneGearDrive, Operating Manual, Page: 22 / 44

7 Diagnostics
7.1 Troubleshooting
Table 13: Troubleshooting
Symptom Possible cause Troubleshooting
Motor not running Incorrect cabling Check the cabling.
Drive setup incorrect Check the setup and parameters in the drive or
PLC. Refer to the drive Operating Guide.
Brake closed Check the cabling and supply voltage.
Conveyor blocked Remove the blockage from the conveyor.
Motor rotating in wrong di-
rection Wrong cabling (OGD Standard) Check the cabling of phases U, V, and W.
Wrong crimping (OGD Hygienic) Check the pin configuration of phases U, V, and
W.
Drive setup incorrect Check the setup and parameters. Refer to the
drive Operating Guide.
OGD mounted in wrong direction Rotate the OGD by 180°.
Motor only rotating in 1 di-
rection Drive setup incorrect Check the setup and parameters. Refer to the
drive Operating Guide.
Unusual mechanical noise Noise from application (for example, conveyor) Check the application.
Oil level low due to incorrect mounting posi-
tion Check the oil level using the oil check kit provi-
ded by Danfoss.
Smallest gear ratio with high speed The smallest gear ratio i=5.92 at high speed is
louder than the bigger gear ratios – this is nor-
mal.
Hammering noise from gear Gears damaged Contact Danfoss service.
Movement of OGD when
running on the conveyor
shaft Conveyor shaft out of specification Use a shaft as specified in this manual.
Black powder in the hollow
shaft cover Conveyor shaft out of specification Use a shaft as specified in this manual.
Torque arm fixed to the conveyor Use a torque arm that allows the motor to
move, for example, the torque arm available
from Danfoss.
Motor temperature too high Motor frequency/current too high Check the gear ratio.
Current too high Check the conveyor lubrication.
Oil on hollow shaft seal Grease from conveyor bearing which can ap-
pear to be oil. It can get from the conveyor side
of the hollow shaft to the other side (white
plastic cover) through the hollow shaft, espe-
cially when it is warm. Clean off the grease and reapply a smaller
amount of grease.
Heated mounting grease which can appear to
be oil. Clean
Heated grease from hollow shaft seal. The hol-
low shaft seal is greased when it is mounted in Clean and check again after 1–2 weeks. Repeat
the procedure if necessary.
AQ347551551757en-000101 / 130R0239 22 | Danfoss A/S © 2020.12
Diagnostics
VLT® OneGearDrive®
Operating Guide