78
VIII Trouble Shooting
VIII Uwatec
®
Aladin
®
Pro Ultra
possible reason(s) response
symptom
Altitude section does
not correspond to the
current altitude.
Desaturation time and
/or no fly time are very
long.
<Atn> appears in place
of the diving depth on
the display.
An unexpected decom-
pression stop appears
in place of no-stop
time or decompression
increases rapidly.
Attention messages are
not given acoustically.
Atmospheric pressure is especially
high or low.
Ambient air pressure measured by
the computer is wrong.
Too many repetitive dives, yo-yo-
diving, square profile repetitive dives
or disregarding decompression stops.
Dissolved nitrogen and/or microbub-
bles must be off gassed first.
Too many repetitive dives, too fast
ascents, yo-yo-diving, square profile
repetitive dives or disregarding
decompression stops. Dissolved
nitrogen and/or microbubbles must
be off gassed first.
Too rapid an ascent or ignoring
decompression stops have caused a
large number of microbubbles, which
leads to an attention message (war-
ning of bubbles).
The acoustic signal of the attention
messages is switched off.
Check barometric information.
Send in dive computer for servicing
(only if altitude section is wrong by
more than one section, see page 51).
Plan sufficiently long surface interval
and dives at lower risk.
Plan sufficiently long surface interval
and dives at lower risk. Review chap-
ters III 5 and IV very carefully.
Plan sufficiently long surface interval
and dives at lower risk. Review chap-
ters III 5 and IV very carefully.
Reactivate attention messages by
means of the interface.
