Display shows 'FL' and suction is reduced; often accompanied by a whistling noise.

Safety first: Remove the battery pack before servicing filters.

• Empty dust bin: Detach and empty the bin. Tap gently to dislodge compacted dirt from corners and the cyclone shroud.
• Clean or replace filters: Remove pre‑motor and HEPA filters. Tap out dust and wash if the manual allows. Replace filters that are damaged or no longer clean after washing.
• Inspect cyclone: Check the perforated metal or plastic shroud for fine dust buildup and clean thoroughly.
• Reset indicator: Some models reset the 'FL' warning automatically after a power cycle; others may have a reset button or require holding a specific button combination (refer to Logik manual).