drain tubing leakage

Hi,

I have changed the bag and now we have constant leakage from the drain tube. Also every 2-3 minutes there is a message that Input pressure too low. An input pressure of 0.5 bar is required. I have checked the tubes, the filter is due to be changed in the next month. Can you please provide me with the troubleshooting info please?

Tank you,

T.M.