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4.6 ERROR CONDITIONS
The Spyder is provided with warning indicators that advise the user to react to
certain situations that would otherwise give rise to a significantly increased risk of
DCS if left unattended. If you do not respond to its warnings, the Spyder will enter
an Error Mode, indicating that the risk of DCS has greatly increased. If you under-
stand and operate the Spyder sensibly, it is very unlikely you will ever put the
Spyder into the Error Mode.
Omitted Decompression
The Error Mode results from omitted decompression, when the diver stays above
the ceiling for more than three minutes. During this three minute period the Er
warning is shown and audible alarm beeps. After this the Spyder will enter a per-
manent Error Mode. The Spyder will continue to function normally if the diver
descends below the ceiling within three minutes.
Once in the permanent Error Mode the Spyder will not show no-decompression or
ascent times. Only a permanent Er warning is shown in the center window. How-
ever, all the other displays will function as before, to provide information for as-
cent. You should immediately ascend to a depth of 3 to 6 m [10 to 20 ft] and remain
at this depth until air supply limitations require you to surface.
When the surface has been reached, no further diving should take place for a mini-
mum of 48 hours. During the permanent Error Mode, the CEILING/ASC
TIME symbol will be displayed in the center window and the Planning Mode
cannot be entered.
