12-3
Interval Part/accessory Procedure
Annually, or
every 5000
hours, or as
necessary
O
2
cell Replace the O
2
sensor if it is damaged (refer to
3.8).
[NOTE] Oxygen cell life specifications are
approximate. The actual cell life depends on
operating environment. Operation at higher
temperatures or higher oxygen concentrations
shortens cell life.
Air intake HEPA filter Replace (refer to 11.2.3).
Ventilator Contact us for preventive maintenance.
Check valve Check the check valves, including gas source
check valve, spontaneously inspiratory check
valve, and expiratory limb check valve. Contact
us for replacement if necessary.
Backup alarm system Check the alarm duration of backup alarm system
(buzzer). If it is too short, contact us.
Gas source sealing ring Check the gas source sealing ring. Contact us for
replacement if necessary.
Expiration valve membrane Check the expiration valve membrane. Contact us
for replacement if necessary.
Every 6 years or
as necessary
Battery of the clock
module
Replace the battery of the clock module. Contact
us for replacement.
Every 20,000
hours
Turbine box Contact us for replacement.