A5/A3™ Service Manual 046-001141-00 3 - 15
Periodic Maintenance Functional Tests
FIGURE 3-16 Manual Circuit Leak Test: Passed
NOTE: If there is a leak, check the pneumatic circuit system for leakage and
troubleshoot the problems as described in 5.3 Pneumatic Circuit
System Problems. Repeat the leak test after the source of the failure has
been resolved.
3.8.1.3 Troubleshooting: Leak Test
The following table lists the commonly-encountered problems and recommended actions for
Section 3.8.1.2 Breathing System Leak Test in Manual Ventilation Mode.
Failure Description Possible Cause Recommended Action
Leak test failure is prompted
immediately after [Start] is
selected (typically, the leak test
requires at least 3 minutes).
The Auto/Manual ventilation
switch is set to the bag position
and the message [Manual Vent.] is
prompted.
Set the Auto/Manual ventilation
switch to the mechanical
ventilation position.
The reading on the drive gas (O2)
pressure gauge indicates drive gas
pressure low (lower than 200 kPa)
and the alarm of [Drive Gas
Pressure Low] is produced.
Replace or connect gas supplies
and make sure that the drive
gas pressure is at 350 to 450
kPa.
During leak test, the pressure
indicated by the airway pressure
gauge fails to reach 30 cmH2O.
1. Before the leak test, the bellows
is not fully inflated.
2. The Y piece on the breathing
tube is not connected to the test
plug.
3. The bellows housing is not
properly installed.
Check the connections of the
pneumatic circuit and re-install
the pneumatic circuit.
During leak test, the pressure
indicated by the airway pressure
gauge fails to reach 30 cmH2O.
1. Before the leak test, the bellows
is not fully inflated.
2. The Y piece on the breathing
tube is not connected to the test
plug.
3. The bellows housing is not
properly installed.
Check the connections of the
pneumatic circuit and re-install
the pneumatic circuit.
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