9.3.4
General inspection
Check that the installation conditions are observed. We recommend doing this after approx.
16 000 operating hours. Check the following at the latest after 2 years:
Table 9-2
Checks that have to be performed during the general inspection
Checking
When the
motor is
running
At stand‐
still
The electrical parameters are maintained.
X
The permissible bearing temperatures are not exceeded.
X
The smooth running characteristics and machine running noise have not de‐
teriorated.
X
The foundation has no cracks or indentations. (*)
X
X
The machine is aligned within the permissible tolerance ranges
X
All the fixing bolts/screws for the mechanical and electrical connections have
been securely tightened
X
All the potential connections, grounding connections and shield supports are
correctly seated and properly bonded
X
The winding insulation resistances are sufficiently high
X
Any bearing insulation is fitted as shown on the plates and labels
X
The CABLES and insulating parts and components are in good condition and
there is no evidence of discoloring
X
(*) You can perform these checks while the motor is at standstill or, if required, while running.
NOTICE
Machine damage
When carrying out the inspection, if you detect any impermissible deviations from the normal
state, you must rectify them immediately. They may otherwise cause damage to the machine.
9.3.5
Assessing the rolling bearings
To assess the rolling bearings, it is generally not necessary to dismantle the machines. The motor
only has to be dismantled if the bearings are to be replaced.
The state of a rolling bearing can be assessed by analyzing the bearing vibration. The
measured values provide an indication and can be assessed by specialists. In this case, please
contact the Service Center.
Maintenance
9.3 Inspection and maintenance
1LE5, 1PC4 shaft heights 280 ... 355
Operating Instructions, 11/2022, A5E41454666A
101
