SUUNTO D6 - Manual (Page 39)

5.7. Error conditions
The dive computer has warning indicators that alert you to react to certain situations
that would significantly increase the risk of DCI. If you do not respond to its warnings,
the dive computer will enter an Error mode, indicating that the risk of DCI has greatly
increased. If you understand the dive computer and operate it sensibly, it is very
unlikely you will ever put the instrument into the Error mode.
Omitted decompression
The Error mode results from omitted decompression, i.e. when you stay above the
ceiling for more than three minutes. During this three-minute period the Er warning is
shown and the audible alarm beeps. After this, the dive computer will enter a permanent
Error mode. The instrument will continue to function normally if you descend below
the ceiling within this three-minute period.
Once in the permanent Error mode, only the Er warning is shown in the center window.
The dive computer will not show times for ascent or stops. However, all the other
displays will function as before to provide information for ascent. 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.
After surfacing, you should not dive for a minimum of 48 hours. During the permanent
Error mode, the Er text will be displayed in the center window and the planning mode
will be disabled.
39