VITO PRO POWER VICSOS100 Mode D'emploi page 42

The compressor starts up regularly due to the pressure
drop in the tank, without any air tools coupled or flowing
from the compressed air line:
• Air leak through the couplings; • Let the compressor warm up until the maximum
pressure is reached and then switch off the
compressor.
If air leaks are inaudible, throw water with detergent
over all connections.
Air leaks will be exposed by the formation of air
bubbles.
Tighten the couplings where there are bubbles. If it
persists, contact technical assistance;