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Problem Possible Cause Corrective Action Reference
Faded display
Unable to
charge (LED
does not
light)
Log data is
not recorded
even when
diving
Log data is
not correctly
stored
according to
the actual
dive (a
portion of the
log data
display is
flashing)
The watch did not switch to dive
mode during diving.
Log data was not stored
starting at some point during
the dive when the insufficient
charge warning function was
activated as a result of the
watch having become
insufficiently charged.
* If the insufficient charge warning
function (BATT is displayed) is
activated during diving, storage of
log data is discontinued from that
time on.
Low ambient temperature. The
display may fade in low-
temperature environments.
Replace the size AA alkaline
batteries with 4 pcs. of fresh ones.
The size AA batteries of the
charger worn out.
The watch is not properly
installed on the charger or
communication unit.
The connection pins of the
charger or communication unit
are soiled.
The watch is already fully
charged.
The file error warning function
(FILE is displayed) has been
activated either before or during
diving.
* Log data may not be stored during
diving if the file error warning
function has been activated.
If “FILE” remains displayed
even after diving, perform the
garbage collection procedure in
the system monitor mode.
Properly reinstall the watch on
the charger or communication
unit so that the two center
connection pins of the charger
or communication unit contact
the gold colored pins at the
3:00 position of the watch.
Wipe off the connection pins
with a dry cloth.
The LED goes out when the
watch is fully charged.
The display will return to normal
when the watch is returned to
normal temperature. If you
want to temporarily make the
display darker when using in
low-temperature environment,
the contrast can be corrected in
the time mode correction state
of the standard mode.
“Using the
Standard Mode: 1-
B Setting the Time
and Date”
“Charger”
“Warning
Functions”
“Using the
Standard Mode: 7.
Using the System
Monitor Mode”
“Warning
Functions”
“Charger: 3.
Charging the
Watch”
Check the section on “Watch
does not switch to dive mode”.
Always make sure to sufficiently
charge the watch before diving.