1) Stop the engine, check the dust discharge valve for damage and replace if damaged. Check if the pre-filtered swirl tube is clogged and clean it if clogged.
2)Check the safety filter element and do not remove it unless the safety filter element is damaged or needs to be replaced.
3) If it is necessary to replace the safety filter element, pull the filter out.
4)The filtercore should be replaced in case of the following situations:
① The outer filter core has been damaged
② After installing the cleaned outer filter element, the indicator still gives an alarm:
③The outer filter core has been cleaned up to 5 times.
Notice: The safety filter element is not allowed to be cleaned and shall be replaced together with the outer filter element at the same time.
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