Siemens SIMOTICS M-1PH8 Operating Instructions & Installation Instructions page 87

CAUTION
Foreign bodies in and on the machine
Foreign bodies such as dirt, tools or loose components, such as screws etc., can be left by
accident inside the machine after maintenance is performed. These can cause short circuits,
reduce the performance of the cooling system or increase noise in operation. They can also
damage the machine.
● When carrying out maintenance work, make sure that no foreign bodes are left in or on
● Securely attach all loose parts again once you have completed the maintenance
● Carefully remove any dirt.
Note
Operating conditions and characteristics can vary widely. For this reason, only general
intervals for inspection and maintenance measures can be specified here.
Explosion hazard due to overheating of the machine caused by a layer of dust
Layers of dust thicker than 5mm can insulate the machine, resulting in overheating. The
maximum surface temperature of the machine cannot be adhered to. The dust can ignite,
resulting in an explosion. This can result in death, serious injury or material damage.
Dust the machine regularly. Do not allow dust layers thicker than 5 mm to build up on the
machine surface. Do not switch the machine on until the dust has been removed.
Risk of explosion due to excessive bearing temperature
The surface temperature cannot be maintained within maximum permissible limits if the
bearing becomes too hot. The dust can ignite, resulting in an explosion. This can result in
death, serious injury or material damage.
● Always check the bearing temperature.
● In addition to the current-dependent overload protection device located in the three phases
SIMOTICS M-1PH8
Operating Instructions 05/2012 A5E03986435A AA
the machine.
procedures.
WARNING
WARNING
of the connecting cable, we recommend that you also monitor the temperature rise in the
motor with the aid of the temperature sensors built into the stator winding.
Maintenance
9.3 Inspection and maintenance
87