ReSound 60 series User Manual page 42

Troubleshooting Guide
Symptom
Excessive whistling /
feedback
Sound distorted /
not clear
Wireless does not work
42
cauSe
Incorrect RIE mould placement
Incorrect dome placement
Excessive ear wax
Feedback control may need adjustment
RIE mould tubing worn or damaged
Hearing instrument settings not optimal
Weak battery
Improper RIE mould or dome fit
Hearing instrument damaged
Hearing instrument settings not optimal
Possible Root Cause - Device is in flight mode