I went through all of this with the fire investigators. The LP detector must be ON any time the RV has a live power source, either from 120V AC through the converter, or from the battery. RVIA establishes Safety codes specific to RVs, not covered by other safety regulatory agencies like the NEC (national electric code) and NFPA 54: NATIONAL FUEL GAS CODE. You cannot operate gas supply solenoids to the furnace, refrigerator, or water heater without 12 volt DC power, hence the LP gas detector wiring scheme.
Some things I believe after working with fire investigators on the storage building fire caused by a MH with an energy source and a refrigerator left on in storage:
*Always close the valves on LP bottles when leaving RV unattended in storage.
*Disconnect batteries at terminals if a disconnect switch is not provided.
*If you must leave a refrigerator running while in storage, run on AC only and close valves on LP bottles.
*For the third time!... you do not want gas appliances in auto ignition mode unattended, CLOSE LP BOTTLES in storage!
*Remember, if you have electrical power to the RV, from battery, LP control systems are HOT. If there is no 110V power , they will activate.
* ALSO: never disconnect the LP gas detector, in fact make sure it is working and update it if it is 5 years old.
*Interesting info in this "RV Safety Alarms test":
http://www.mtidealer.com/images/Safe...012Revised.pps
you will probably have to go to your downloads folder after clicking this link to open it