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For the high water alarm i used the Orange wires. Just to cover the basics on electrical circuits, an open circuit is a broken circuit, while a closed circuit is a complete one. The high water alarm works by completing (closing) the circuit when the float is raised. Since it is normally open, the spot defines this as an open sensor. Also be sure to keep your info online up to date. I Ran into a wall when i moved the sensor to another wire set and forgot to update the alert profile online. I spent an hour (and several words a pirate would be proud of) thinking it wasn't working before i checked online and saw that it was coming through, but i didn't select a phone for it to call.
I used a rule bilge pump switch as my sensor and wired it directly to the orange wires on the spot harness. I tested this several times by placing the rig in a bucket and filling it with water before I installed it on the boat. Here is another deviation from the printed manual:
There is a 30 second delay before the alarm triggers!!! In order to begin the alarm signal, the circuit must be closed for 30 seconds. This is to prevent false alarms.
On a side note, i have my unit wired into my 12v system. I know when running on internal batteries, the unit does go into a standby mode to save power. However I have no idea how this affects alarm reaction times.
As far as false theft alarms, I have not had any issues with that. My guess is maybe the unit losses communication with the fob due to physical barriers. Is your fob far from the base unit during operation? or do you move it around while the boat is in motion? My FOB is attached to my engine key so during operation, it is only about 5 feet from the base unit at all times. Also, replace the batteries, maybe it has enough power for the initial transmission, but gets weaker as the day progresses.