Printer with an air pressurization system and method of building up air pressure in a printing fluid supplier

A method of determining a degradation of an air pressurization system in a printer comprising a printing fluid circuit having at least one printing fluid supplier, and an air pressurization system to build up air pressure inside the at least one printing fluid supplier, wherein the air pressurization system is fluidly connected to the at least one printing fluid supplier,

• wherein the method comprises:
• determining the air pressure which has been built up in the at least one printing fluid supplier by the air pressurization system;
• determining a time T used to build up a given air pressure inside the at least one printing fluid supplier by the air pressurization system;
• comparing the determined time T with a plurality of given times corresponding to a plurality of degradation levels of the air pressurization system;
• and
• determining a degradation of the air pressurization system depending on a result of the comparison of the determined time T to the plurality of given times, the determined degradation being a selected degradation level of the plurality of degradation levels.

A non-transitory computer program product for determining a degradation of an air pressurization system in a printer comprising a printing fluid circuit having at least one printing fluid supplier, and an air pressurization system to build up air pressure inside the at least one printing fluid supplier, wherein the air pressurization system is fluidly connected to the at least one printing fluid supplier, said computer program product comprising program code, when executed by a computer, to:

• determine the air pressure which has been built up in the at least one printing fluid supplier by the air pressurization system,
• determine a time T used to build up a given air pressure inside the at least one printing fluid supplier by the air pressurization system,
• compare the determined time T with a plurality of given times corresponding to a plurality of degradation levels of the air pressurization system, and
• determine a degradation of the air pressurization system depending on a result of the comparison of the determined time T to the plurality of given times, the determined degradation being a selected degradation level of the plurality of degradation levels.