Battery draw - Central convenience error

Hi

i have a problem with a skoda octavia 1u2 2010 - 

the car is draining the battery in about 2-3 days

i measured the parasitic draw - and it's about 0.3 amps per hour

there is a relatively new viper alarm installed - with a funny thing - the viper module was not putting out a strong enough current to triger the car to lock/unlock so it needed a relay

another thing is that in a recent scan i noticed 2 errors in the central convenience module : 1 about low voltage 01330 53-10 

and another one 01030 29-10 - which i understand it's about Driver Side; Lock 29-10 - Short to Ground

what are the next steps in detecting the cause ? 

thank you