To start the APU
a. Put the BAT switches ON.
b. Push the MASTER SWITCH. A blue light will illuminate.
c. Wait until FLAP OPEN indication appears on the ECAM System Display.
d. Once intake flap is open, push the START button. The blue START light will illuminate. e. The EGT and RPM will start to rise. Monitor EGT rise and maximum EGT during starting. Should the EGT crosses the maximum starting limit, immediately press the MASTER SWITCH to close.
f. As soon as the RPM reaches 95%, the blue START light will go out and 2 seconds after, the APU page of ECAM will indicate AVAIL in green, indicating APU is now available.
g. Push the EXT PWR switch to OFF.
h. Put the APU BLEED ON, indicated by a blue light.