| Cause | Solution |
|---|---|
| Suction hose or suction tube is blocked. | Remove obstructions and blockages. |
| The metal container is not closed. | Close the metal container. |
| The metal container is full. | Empty the metal container (see “Cleaning/ Maintenance” in the manual). |
| The pleated filter is clogged. | Clean or replace the pleated filter (see "Cleaning/Maintenance” in the manual). |
| The air filter is clogged. | Clean the air filter (see “Cleaning/ Maintenance” in the manual). |
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