Check that the installation conditions are observed. We recommend that the following checks
are performed after approx. 16 000 operating hours or at the latest after two years:
The electrical parameters are maintained
The permissible bearing temperatures are not exceeded (Page 86)
The smooth running characteristics and machine running noise have not
The motor foundation has no cracks and indentations (*)
The machine is aligned within the permissible tolerance ranges
All the fixing bolts/screws for the mechanical and electrical connections have
been securely tightened
All the potential connections, grounding connections and shield supports are
correctly seated and properly bonded
The winding insulation resistances are sufficiently high
Any bearing insulation is fitted as shown on the plates and labels
The CABLES and insulating parts and components are in good condition
and there is no evidence of discoloring
(*) You can perform these checks while the motor is at standstill or, if required, while running.
If you detect any deviations during the inspection, you must rectify them immediately. They
may otherwise cause damage to the machine.
Set values for monitoring the winding temperature (Page 86)
Servicing the roller bearings
When inspecting rolling-contact bearings, it is generally not necessary to dismantle the
machines. The motor only has to be dismantled if the bearings are to be replaced.
Servicing and maintaining the anti-condensation heating
The anti-condensation heating is maintenance-free. If it is defective, contact the
Service Center (Page 143).
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014
Checks that have to be performed during the general inspection
9.1 Inspection and maintenance