Dustcontrol DC AirCube 500 Traduction Des Instructions De Service D'origine page 29

When the suction power starts to drop due to excessive dust load, this is indicated by
the red warning light – replace the pre-filter.
When using a long hose or when the outlet is covered, the warning light (filter lamp)
may be lit. Before changing the filter, make sure that the outlet is free when the
warning light is lit.
If the suction power is still weak after pre-filter replacement, replace the HEPA filter. In
case of heavy dust load, the service life is shorter.
CAUTION
The light function is only active at maximum speed.
Only use accessories and replacement parts included in the Dustcontrol product line.
Filter replacement may only be performed by trained personnel. Use a protective
mask and suitable equipment.
Place used filters in a plastic bag and seal the bag.
Regularly check the power cord for damage. The machine must be tested and
inspected at least once a year due to its use with hazardous materials. Worn parts
must be replaced. Never risk functionality and service life. Only use genuine parts.
When the light is on, it's time for service.
Filter Replacement AirCube 500
Pre-filter replacement:
HEPA filter installation:
DC AirCube, Art.nr. 94178-E 29