Why are the lights flashing on my display?

If the button second from the left has a flashing green light, gas has been programmed. If you are not using an inert gas flush kit (or the gas tank is empty or machine is not equipped for gas flush), the machine will not operate if gas is programmed. Please go through each program P1-P9 and follow the instructions below to make sure gas is not programmed in ANY program. LED 1: VACUUM % a) Set Vacuum Percentage: Use the UP & DOWN keys to select the vacuum percentage (at 99.9% machine offers Extra Vacuum Time). Press the S key to move forward. b) Set Extra Vacuum Time: Use the UP & DOWN keys to select your desired value (up to 30 seconds). Press the S key to move forward. LED 2: INERT GAS % [Optional] Use the DOWN key to select ZERO for inert gas injection. Press the S key to move forward. LED 3: SEALING TIME Use the UP & DOWN keys to select the sealing time in seconds. Press the S key to lock in the data. LED 4: AIR RETURN No programming necessarry.