User manual

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13. Maintenance and cleaning
Regularly check the technical safety of the device, e.g. for a
damaged casing.
If you have reason to believe that the device can no longer be
operated safely, disconnect it immediately and make sure it
is not operated unintentionally.
It must be assumed that safe operation is no longer possible
if:
• the device shows visible damage
• the device is longer working
• the device has been stored under unfavourable conditions
for an extended period of time or
• the device has been subjected to heavy stress during trans-
port.
Always observe the following safety information before
cleaning or servicing the device:
Live components may be exposed if cover is opened.
The device must be disconnected from all power sourc-
es before any servicing or repair work is carried out.
Capacitors inside the device may still carry voltage even
though they have been disconnected from all power
sources.