A7™ Service Manual 046-006272-00 5 - 63
Repair and Troubleshooting Pneumatic Circuit System Problems
FIGURE 5-56
9. 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 No.1 connector to which
drive gas pipeline of the circuit adapter test fixture corresponds, as shown below.
10.Release the negative pressure ball. If the negative pressure ball is fully expanded within 30
seconds, it indicates that the test of the drive gas pipeline has failed. Check the expiratory
valve assembly and the drive gas related pipeline inside the main unit.
5. Check the absorb canister assembly
Tools required:
•VT PLUS (quantity: 1)
• Lucer adapter connector (quantity: 1)
• Injector (quantity: 1)
• Ø6 silicone tube (quantity: 2)
• PU tube (6X300) (quantity: 1)
• Breathing tube (quantity: 3)
• Y piece (quantity: 1)
• Breathing tube Y piece (quantity: 1)
• Breathing tube adapter connector (quantity: 1)
• T-shaped Allen wrench (quantity: 1)
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