4 Service and Maintenance
WARNING
HIGH VOLTAGE
Potentially lethal voltage is present on the connectors.
Before working on the power connectors (disconnecting or
connecting the cable), disconnect the power supply
module from the mains and wait for the discharge time to
elapse.
WARNING
DISCHARGE TIME
The DC link capacitors remain charged for some time after
the mains supply is switched off.
To avoid electrical shock, fully disconnect the VLT
®
OneGearDrive from the mains before carrying out
maintenance. Wait for at least 10 minutes before carrying
out maintenance work.
4.1 Maintenance
To prevent breakdown, danger, and damage, examine the
drive units at regular intervals depending on the operating
conditions. Replace worn or damaged parts using original
spare parts or standard parts.
The VLT
®
OneGearDrives are largely maintenance free.
The maintenance tasks listed in
may be
performed by the customer. No other tasks are required.
Component
Maintenance
task
Maintenance
interval
Instruction
VLT
®
OneGearDrive
Check for
abnormal
noise and
vibration
Every 6
months
Contact Danfoss
Service
Protective
coating
Check for
damage
Every 6
months
Repair damage
using the
Danfoss Paint
Repair Set
Hollow shaft
seal (stainless
steel shaft)
Check the
condition and
check for
leakage
Every 6
months
If damaged
replace with a
Viton seal
Hollow shaft
seal (mild steel
shaft)
Check the
condition and
check for
leakage
Every 6
months
If damaged
replace with an
EPDM seal
Oil
Change the oil Standard oil:
after 25000
operating
hours
Food grade
oil: after
35000
operating
hours
See
Check for oil
leakage on
gear and
motor housing
Every 12
months
Replace the
VLT
®
OneGearDrive
Table 4.1 Overview of Maintenance Tasks
4.1.1 Replacing the Brake and Rotor
All work can only be carried out by qualified technical
personnel on a stationary machine, which has been
protected against restarting. This also applies to auxiliary
circuits.
Service and Maintenance
VLT
®
OneGearDrive Operating Instructions
16
MG75C302 - VLT
®
is a registered Danfoss trademark
4
4