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13. Maintenance
Check the technical safety of the product regularly, e.g. for damage to the connection cables or to the
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 can be assumed that safe operation is no longer possible if:
• there is visible damage to the device or to the cables
• the device is longer working
• the device has been stored under unfavourable conditions for an extended period of time
• the device has been subjected to heavy stress during transport.
Always observe the following warning notes before cleaning or servicing the device:
Live components may be exposed if covers are opened or parts are removed (unless this can be
done without tools).
Connection points may also be live.
Before reconciliation, maintenance, repair or replacement of parts or assemblies, the device
must be disconnected from all voltage sources if it has to be opened.
If servicing of or repairs on the opened device are necessary, such must be carried out by a
specialist who is familiar with the risks involved and with the relevant regulations.
Capacitors inside the device may still carry voltage even though they have been disconnected
from all power sources.
a) Fuse Replacement
If it becomes necessary to replace a fuse, make sure that only fuses of the prescribed type and nominal
current are used (see „Technical Data“).
Never repair fuses or bridge the fuse holder.
• Unplug the mains plug from the mains socket and disconnect the low-voltage cable from the mains
connection (5) at the device.
• Carefully open the fuse holder with the faulty fuse next to the mains connection (5) using a suitable
screwdriver.
• Remove the defective fuse and replace it by a new fuse of the indicated type.
• Carefully push the fuse holder with the new fuse back into its position at the mains connection (5).
• After this, you can reconnect the device to the mains and take it into operation.
