Since it resets when you plug in. To prevent false alarms from brief “puffs” of gas the detector has a recheck cycle before alarming. Cut lead wires, faulty circuit connection, a blown or missing fuse, improper supply.
Safe T Alert Carbon Monoxide & Propane Gas Detector Fifth Wheeler
This detector will only indicate the presence of. Propane gas detectors this unit will not work without power. Periodically test the detector's functionality by introducing a controlled amount of propane gas near the.
If high levels of gas remain during the recheck cycle, the detector will alarm.
I would check the power going to it and make sure that everything is connected properly. My best guess would be that your alternating red/green flashing light/beep is a unit malfunction alarm that is being triggered by low voltage. Propane detectors are designed to monitor gas levels. Below is a link to the manual.
Examples causing no power are: Wired directly into the electrical system, the sensor. Below is also a picture of what the beeps mean. Examples causing no power are:


