Prolux Phantom Instruction Manual page 23

Maintenance
Change the dust filter bag at the latest when the electronic dust filter bag change indicator shows "red" or
the suction power has decreased.
Changing Dust Bag
l. Open the dust bag compartment cover by unlatching and subsequently raising it.
2. Raise the dust bag compartment cover until it locks in the highest position and remains open by itself.
NOTE: Be careful when removing the dust filter bag so that no dust escapes.
3. Pull the dust filter bag up and out of the bag holder.
4. Remove any dust that may have been collected in the dust bag compartment.
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