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8.4.4 Breathing System
The following table lists the faults related to the breathing system.
Failure
Description
Possible Cause Recommended Action
Leakage
The CO2 canister in not properly
installed.
Re-install the CO2 canister. Clean
the soda lime at the sealing joint.
Ensure that the soda lime canister
is properly installed.
The sealing part of the canister assembly
is damaged, including the sealing gaskets
(049-000142-00 and 049-000145-00)
that are directly in contact with the
canister and two seal rings
(082-000629-00) on the seal-capping of
the bypass that are in contact with the
bottom chassis of the circuit.
Replace the sealing part of the
CO2 canister assembly. The
sealing part should be replaced at
least once a year.
The sealing part of the breathing bag arm
is damaged.
Replace the sealing part of the
breathing bag arm. The sealing
part should be replaced at least
once a year.
The water collection cup is loose.
Check and fasten the water
collection cup.
The sealing part of the water collection
cup assembly is damaged.
Replace the sealing part of the
water collection cup. The sealing
part should be replaced at least
once a year.
The sealing part of the circuit transit
block assembly is damaged.
Replace the sealing part once
every year.
The bellow enclosure or bellow is not
properly installed.
Re-install the bellow enclosure or
bellow. Ensure that the installation
is correct.
The sealing gasket of the bellow is
dropped off or damaged.
Replace the sealing gasket of the
bellow once every year.
The valve cap of the breathing valve
assembly is not properly installed.
Re-install the valve cap properly.
The sealing part of the valve cap of the
breathing valve assembly is damaged.
Replace the sealing part.
The O2 sensor is not properly installed. Re-install the O2 sensor properly.
The sealing part of the O2 sensor or the
O2 sensor plug is damaged.
Replace the sealing part.
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