Panasonic ES-LS9A-K803 Operating Instructions Manual page 20

Problem
The shaving sensor
responds even though
the shaver is not in
contact with the skin.
20
Action
Clean the beard trimmings
from the shaver.
Clean the system outer foil
with the brush. (See
page 17.)
When the shaver is
extremely dirty, remove the
foil frame and wash with
water.
(See page 16.)
Replace the system outer foil.
Expected life of system
outer foil:
Approximately 18 months
Problem
Operating time is
short even after a full
charge.
Shaver does not
operate even after
charging.
Action
Although the shaver can be
used for about 2 weeks after
a full charge (assuming
dry‑shave usages for 3
minutes per day), the usable
number of days might be
lower depending on how the
shaver is used (for example,
when used for wet shaving).
Apply oil.
Clean the shaver.
When the number of
operations per charge starts
to decrease, the battery is
nearing the end of its life.
Use the appliance in an
ambient temperature
approximately 5 °C or higher.
The battery has reached the
end of its life.
The shaver will not operate
with the AC adaptor
connected. Please use the
shaver after it has been
sufficiently charged and the
AC adaptor disconnected.