User's Guide

26
Please use a soft and dry cloth to remove the dust or dirt on
the equipment.
• Cleaning of stubborn dirt:
Please use a soft wet towel with diluted cleaning detergent
to clean it, then wipe with a dry cloth.
• Never use solvents like benzene, thinner or gasoline as
detergent by reason of that they will spoil the exterior of
FSU810 or change the color of it.
3.2 Troubleshooting
• When encountering difficult during usage, please consult
the following troubleshooting table:
Phenomena Diagnosis Elimination
Check the connection
between FSU810 and the
power adaptor.
Connect FSU810
with the power
adaptor correctly.
FSU810
can not be
started
Verify that the power
adaptor is connected to a
working electrical outlet.
Connect the 3-
phase plug of the
charger with the
outlet of a working
electrical source.
Make sure FSU810 is
located in the region of the
network services.
Poor voice
quality or
the phone
fails to
function.
See if there are some
objects nearby that will
obstruct or absorb the
signals.
Move FSU810 to
the appropriate
location.