Se7en Error Checker

Where this data comes from

Everything here is transcribed from documents published by Poseidon Diving Systems. They are the source — not us. Every test names the page it came from. Read them yourself:

• Poseidon Se7en+ User Manual 2.5 (March 2025) — Primary source: tests, timings, error codes per test, and the remedies. The file is named “ver_2.4”; the document itself says Manual Version 2.5, March 2025.
• Test and Error codes, Se7en Revision 1.0, 2015-05-06 — The wording of every error-code description and test name.
• Release notes for firmware version 2.67 / 2.04 2023-09-19 — Error 93 (M28 battery, test 48).
• Poseidon Se7en+ User Manual 2.2 (February 2022) — Cross-check. Its table matches 2.5 except error 93 and one note on test 24.
• Poseidon Se7en User Manual 1.3 (January 2017) — Tests 39 and 40, which the Se7en+ manuals no longer list; cross-check.
• Poseidon MKVI User Manual 2.6 (September 2013) — Cross-check. It shows the test 18 / 24 remedy swap most plainly.

Where we depart from them, the answer says so — and here is every place we do (6).