Maintaining The External Fan (Forced Ventilation) - Siemens SIMOTICS XP 1MB1 series Operating Instructions Manual

9.2.15

Maintaining the external fan (forced ventilation)

Rotating or live parts
Live electrical parts are dangerous. Contact with them can cause death, serious injury or
material damage.
Before performing any maintenance work on the external fan, disconnect it from the mains,
particularly before opening the terminal box. Make sure that the device cannot be switched
back on.
Servicing the external fan
The external fan is essentially maintenance-free. However, dirt and dust deposits on the
impeller and the motor, particularly in the gap between the impeller and the inlet nozzle can
impair its function.
● Remove the dirt and dust deposits regularly; the intervals depend on how dirty the
surrounding area is.
● Make sure that the impeller is evenly cleaned, as irregular deposits can lead to an
imbalance.
The full flowrate is only achieved if the inward flow of air to the impeller is unrestricted.
Servicing the external fan motor
Please observe all specifications and intervals in the operating instructions for the external
fan motor. If a SIMOTICS XP 1MB1.5/1MB5.5 low-voltage motor is used as an external fan
motor, these operating instructions also apply for the external fan motor.
To avoid unnecessary downtimes, always carry out all inspection and maintenance work on
the main and external fan motor simultaneously.
● Perform an occasional visual inspection of the external fan motor and check it electrically
and mechanically every time the rolling bearings are replaced.
● Replace permanently lubricated rolling bearings in the external fan motor as specified in
the operating instructions for the external fan motor.
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
WARNING
Maintenance
9.2 Inspection and maintenance
121