Maintenance
9-1
 SHB9300CRV EN 2.0
9 Maintenance
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The controller is free of maintenance if the prescribed conditions of operation are observed.
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3-2)
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If the ambient air is polluted, the air vents of the controller may be obstructed. Therefore,
check the air vents in regular intervals (according to the degree of pollution approx. every
four weeks :
Free the obstructed air vents using a vacuum cleaner.
Stop!
Do not use sharp or pointed tools such as knives or screwdrivers to clean the air vents.