A5/A3â„¢ Service Manual 046-001141-00 5 - 57
Repair and Troubleshooting Pneumatic Circuit System Problems
FIGURE 5-60
7. Push in the push rod of the injector to let the pressure reading on the anesthesia machine
calibration device rise to 30 to 35 cmH2O and then stop pushing. Keep the relative position
between the push rod and the injector unchanged. If the pressure reading on the anesthesia
machine calibration device falls more than 10cmH2O within 30s, this test is failed. It indicates
that the bellows housing or the Manual position of the Auto/Manual ventilation switch is
leaky. (Removing the bag arm indicated in the picture has no impact upon the test because
the drive gas does not pass through the bag arm.)
4. Leak test of all pipelines on the circuit adapter
Tools required:
• Negative pressure ball (quantity: 1)
• Circuit adapter test fixture (quantity: 1)
• PU tube (6X100) (quantity: 1)
Test procedures:
1. Turn off the system switch.
2. Turn off the flow regulators.
3. Remove the breathing system.
4. Mount the circuit adapter test fixture onto the circuit adapter.
5. Flatten the negative pressure ball to remove the gas inside. Then re-install the plug to seal
the ball. Connect the other end of the negative pressure ball to the No.7 connector (on the
circuit adapter test fixture) fresh gas pipeline of the circuit adapter test fixture, as shown
below.
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