Telling us what type of jacks you have would help in trouble shooting. Here are some notes I have from my Big Foot Leveler Jacks.
-Alarm sounding at engine start may mean a jack is partially down. Push RETRACT all.
-Alarm sounding while traveling means a jack has slipped down a little i.e. 1/2”, usually due to a bumpy road. Stop, turn off engine and push RETRACT all.
-L & R Lights on = System has Timed out, Power on System.
-All up flashing or Air Dump flashing = Communication Error on panel or sensor board. Red wire to sensor bad or power is lost. Unscrew panel,
disconnect red wire and reconnect in 2 minutes.
-Occasionally manually raise Rear all the way up, let rest for 10 min. Repeat for the Front. This purges air in pump from never extending jacks all
the way out.
-The below pic is from another post in this forum of a user adding small rubber plugs from an auto store to depress the “jack position sensor”. When this foot drops a little or does not fully retract it causes the alarm to sound (as mentioned above).
I hope this helps