Maintenance; Intervals - Weinmann BiLevel ST 22 Operating Instructions Manual

8. Maintenance

8.1 Intervals

Both filters must be regularly checked for contamination.
• Clean the coarse dust filter once a week and replace it at least every 6 months.
• The fine filter must be changed at the latest after 1000 operating hours (filter
change symbol
For hygiene reasons, we recommend that the following parts be changed at the
stated intervals:
• Pressure measurement hose every 6 months – sooner if contaminated
• Complete mask system depending on contamination, every 6 to 12 months
• Exhalation system according to the relevant Operating Instructions
As a preventative measure, maintenance must be carried out at the following
intervals:
• Every 5000 operating hours (maintenance symbol
• At the latest after 2 years (see maintenance label on the back of the device)
We recommend that repairs are only carried out by Weinmann or by authorized
dealers.
Maintenance include:
– Check for completeness
– Visual inspection for mechanical damage
– Filter change
– Cleaning the unit
– Replacement of any defective parts
– Complete check of unit functions and pressure displays
– Battery change
– Final test according to test instruction WM 24954
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Maintenance
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