Check the battery voltage. Your profile shows a 2009 camper. If it is the original battery, it could have been a low voltage alarm. Also check the expiration date on the back of the unit. The sensor has a fixed life span and the unit may need to be replaced.
2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 65W solar panels