As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - WHILE AT THE GATE, A -CIDS- CAUTION LIGHT CAME ON. MAINTENANCE PERFORMED A BITE CHECK OF THE CIDS SYSTEM AND DETERMINED THAT THE LEFT, OVERWING, EMERGENCY EXIT SLIDE BOTTLE INDICATED IN THE RED BAND. THE AIRCRAFT WAS MAINTENANCE FERRIED TO PHL AND THE BOTTLE WAS SERVICED. THE BOTTLE WAS LEAK CHECKED WITH NO LEAKS NOTED. OK FOR SERVICE.