To Next Page

To Previous Page

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.