Siemens SIMATIC S5 1P 243, Operating Instructions & Installation Instructions

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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.
Note
Flowrate
The full flowrate is only achieved if the inward flow of air to the impeller is unrestricted.
Servicing the external fan motor
● Perform an occasional visual inspection of the external fan motor and check it electrically
and mechanically every time the roller bearings are replaced.
● Replace permanently lubricated roller bearings in the external fan motor as specified in the
operating instructions for the external fan motor.
9.1.7.9 Maintaining terminal boxes
Requirement
The machine is de-energized.
Checking the terminal box
● Terminal boxes must be regularly checked for tightness, undamaged insulation, and tight
terminal connections.
● If dust or humidity have infiltrated the terminal box, this should be cleaned and dried
(particularly the insulators).
Check all the seals and sealing surfaces and address the cause of the leakiness.
● Check the insulators, connectors and cable connections in the terminal box.
● Replace the damaged components if necessary.
WARNING
Short-circuit hazard
Damaged components can cause short circuits, possibly resulting in death, serious
injuries and property damage.
Replace damaged components.
Maintenance
9.1 Inspection and maintenance
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
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