7 Maintaining the product
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7.4.
Checking/replacing the crude gas fresh air
filter and secondary filter
Checking the fresh air and secondary filters:
> Check the fresh air and secondary filters regularly for
contamination. In the event of visible contamination: change
the filter.
Replacing the fresh air and secondary filters:
The filter chamber may contain condensate.
When replacing the fresh air or the secondary filter, the
condensate container must not be removed from the
testo 380.
1. Open the filter chamber: turn the filter cover anti-clockwise and
take it off.
2. Remove the exhausted filter and replace it with a new one.
