Hello -
Read the central vacuum cleaner troubleshooting steps here:
https://www.centralvacuumstores.com/t/central-vacuums-maintain-troubleshoot-fast
If what you have written means that the central vacuum cleaner now runs continuously unless you disconnect the low voltage wire, then focus on the troubleshooting steps with the heading "Unit Runs Continuously."
Since the problem started when you experienced water coming into your home when there was a violet rain storm, be sure you have that water leak problem repaired.
Best wishes.
CORRECTIONS
'then i started to rain'---then it started to rain...
'after a minute i relieved '---after a minute i realized...
ok....i've got it workin...for now i think..
i dropped my sansa mp3 player into swimming pool.
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