Siemens MUSIC Pro User Manual page 49

If the hearing instrument is too quiet
Most likely, you need to insert a new battery. If it is
still too quiet, clean the instrument or the ear mould
and hearing tube, following the directions in the
chapter "Notes for cleaning and care" . If neither a
new battery nor cleaning helps, as a precaution
you should ask your hearing instrument specialist
to test your hearing again.
If the hearing instrument does not work at all
Is the instrument turned on? Is the battery
compartment completely closed? Is the battery
inserted correctly? Is it possible that the battery is
dead?
If none of these hints help, you should visit your
All
hearing instrument specialist.
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