User manual

Poseidon MKVI User Manual Appendix 1
Page 68
Appendix 1 - Troubleshooting guide
This Appendix provides detailed information on possible problems that may occur when pre-
paring or using the Poseidon MKVI for diving. It is divided into two main sections: The Auto-
matic Pre-Dive Tests, and Hardware Issues. The Automatic Pre-Dive Test section includes all
of the automated tests according to each test number, with a description of what is being
tested and the possible failure modes, as well as possible causes and solutions. The Hardware
Issues section discusses various problems that can occur with the mechanical aspects of the
MkVI, and how to correct them. Many of the problems in both sections can be easily solved by
the diver; but some require repair at an authorised Poseidon Service Center.
Never tamper with bolts or screws this may permanently destroy the unit. This is due to that
the internal cavities may be lled.
Do not try to alter the clock setttings to bypass service intervals etc. This may set the unit in
an un operable state.
Automatic pre-dive test
As described in Chapter 2 of the Manual, the Poseidon MKVI electronics automatically conduct
a series of tests whenever the system is powered-up (i.e., whenever a battery is inserted into
the electronics module, or the wet switch on the back of the Primary Display is activated).
While these tests are running, the test number is shown on the left side of the Primary Display
(where the depth is normally shown), and the test number is preceeded by a lower-case “t”
(see Figure A1-1). When each test is active, a “spinning wheel” is displayed on the right side
of the display, where the remaining dive time is normally displayed. This “spinning wheel” is
represented by a “0” character in the right-most position, missing one of the segments. The
missing segment rotates positions around the “0” in a clockwise direction. The purpose of this
symbol is to assure the diver that the test is still actively being conducted, and the system has
not locked up.
When a test completes successfully, the next test begins automatically, as represented by the
increasing “t” number on the left side of the Prmary Display. The bar graph located along the
Figure A1-1: Test 17 (Backlight Power
consumption), displaying test number on
the left and the “spinning wheel” on the right.
Figure A1-2: Test 17 failure, with
ashing test number and error code.
top of the display (normally used as an ascent rate indicator) serves as a progress bar for the
test routine; starting with all segments lit, then eliminating segments from right to left as the
test or set of tests progresses. If a test fails, the test number ashes, and the “spinning wheel”
indicator on the right side of the display is replaced by a ashing error code, indicating what
aspect of the test failed (Figure A1-2). When a test fails the MKVI will either power down after
5 minutes or power down if the user goes through the wet/dry conrmation sequence. This
gives the user time to note the displayed error code. The ve minute power down will be reset
if an IrDA message is received (if the wet switch is not activated and the system has not
entered Dive Mode due to exposure to depth).
It is important to carefully monitor the automatic pre-dive test routine, in case a test fails. Upon
test failure, the test number and error code will ash until the user conrms the error by wet
switch wet procedure or will power down after 5 minutes whichever comes rst. The audio
alarm will sound during this time to alert the diver to test failure. It is important to note BOTH
the test number (left side of the display), and the error code number (right side of the display),
because both of these values are needed to identify the likely cause of the problem and, in
some cases, determine the best course of action to correct the problem.