Creo que es un problema de presion en el sistema, verifica si la prueba de fuga.
1 Thread down the O2 cell
and press it down into its
mount
2 Replace the breathing
circuit
3 Cap the sample line
leading to the agent
monitor
4 Cap the Recirculation
Port (if installed) located
behind the auxiliary O2
flowmeter
5 Leaking O-rings at ypiece
seal
6 Inspect bellows dome Oring
7 Check Neg. Pressure
relief valve membrane is
present
8 Tighten INSP and EXSP
ring
o tambien
reason solution
O2 cell O-ring Replace leaky O2 cell diffuser
O-ring
Breathing circuit leaks Replace breathing circuit
Loose valve rings Hand tighten
Leaking bellows or dome Replace bellows
Leaky docking station O-ring See Section 4.0 for docking
(C, F or G) station O-ring locations
2.9 psi regulator out of cal (too Check/calibrate Pressure
low)