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TITLE
8
TROUBLESHOOTING
8
After all the symbols
on display illuminate,
a " " mark
is displayed.
The display light is not
turned on.
A "0 0" symbol
is displayed.
“°F” or “°C”flashes,
but “0” symbol
is NOT displayed
Meaning Action
Nothing is displayed
even after unit
is turned on.
Dead battery. Replace battery.
Replace the battery
with correct polarities.
Polarities of battery
are (+ and -) wrong.
Replace battery.Low battery.
Low battery. Replace battery.
Replace the lens cover
with a new one.
The lens cover may
be dirty.
Clean the lens with
a cotton swab.
Lens may be dirty.
Remove earwax.
Ear drum may
be blocked with earwax.
Place unit in ear, wait
2 seconds. Press button
and wait for 4 beeps.
Remove from ear,
look at results.
The unit is working
under high room
temperature, where
a special operation
is needed.
Display