Mindray WATO EX-55Pro, Service Manual

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8-29
NOTE

If a leak exists, check whether the pneumatic circuit system leaks, and perform
troubleshooting following the information in ‘Section 8.3. Circuit Leak Test’. After
the fault source is repaired, second leak test shall be conducted.

If a leak exists, check whether the pneumatic circuit system leaks, and perform
troubleshooting following the information in ‘Section 8.5. 4 Respiratory System’.
After the leak is removed, second leak test shall be conducted.
8.3.3 Troubleshooting—Leak Test
The following table lists the commonly-encountered problems and recommends actions for
breathing system leak test in mechanical ventilation mode.
Fault 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 switch is set to the
Manual position and the message [Manual
Vent.] is prompted. Set the Auto/Manual switch
to the Auto 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. 1. Allow the bellows to be
fully inflated before leak
test.
2. Connect the Y piece on the
breathing tube to the test
plug.
3. Re-install the bellows
housing.
4. Block the sample gas
return quick connector
8.4 Airway System Failure
The airway system mainly consists of AG transmission system, anesthetics transmission device
(vaporizer), anesthesia system, and ventilation and AG cleaning system. This section describes the
faults that may occur in the airway system and the troubleshooting methods.