probst RVD-4,5-ECO Operating Instructions Manual page 36

Maintenance and care
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6 Maintenance and care
6.1 Maintenance
To ensure the correct function, safety and service life of the device the following points must be executed in
the maintenance interval.
Used only original spare parts, otherwise the warranty expires.
All operations may only be made in closed state of the device!
For all operations you have to make sure, that the device will not close unintended. Danger of injury!
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