Diagnostics; Troubleshooting - Danfoss VLT OneGearDrive Operating Manual

VLT® OneGearDrive®
Operating Guide

7 Diagnostics

7.1 Troubleshooting

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