Mindray WATO EX-55Pro, Service Manual

Page: 295 / 474

8-41
Failure Description Possible Cause Recommended Action
gauge is damaged. pressure gauge.
When the O2 supply
pressure is too low,
the "O2 Supply
Failure" alarm is not
generated; or when
the O2 supply
pressure is within
the specified range,
the "O2 Supply
Failure" alarm is
generated.
The pressure switch of
the O2 inlet assembly is
faulty.
Adjust the pressure switch of the O2 inlet
assembly to keep the O2 supply pressure
between 0.15 MPa and 0.25 MPa, as close to
0.2 MPa as possible when this alarm is
generated. If the adjustment fails, replace the
pressure switch (refer to section
8.6.1.3Adjusting the Pressure Switch
).
When the drive gas
supply pressure is
too low, the "Drive
Gas Pressure Low"
alarm is not
generated; or when
the drive gas supply
pressure is within
the specified range,
the "Drive Gas
Pressure Low" alarm
is generated.
The pressure switch of
the integrated airway of
the exhalation valve or
PEEP safety valve is
faulty. Alternatively, the
filter of the integrated
airway of the exhalation
valve assembly is
blocked.
Adjust the pressure switch of the integrated
airway of the exhalation valve assembly to
keep the drive gas pressure between 0.05
MPa and 0.2 MPa, as close to 0.14 MPa as
possible when this alarm is generated. If the
adjustment fails, replace the pressure switch.
If the issue persists after the pressure switch
is replaced, replace the integrated airway of
the exhalation valve assembly (refer to
section
8.6.1.3Adjusting the Pressure
Switch
).
8.4.2.1 Testing the Pipeline Pressure Gauge and Calibrating the
Regulator
Use the following tools to test the pipeline pressure gauge and regulator of the pipeline inlet
assembly:

One 1 MPa (10 bar) test pressure gauge (before test, ensure that the test pressure gauge
is in good conditions)
 One 3106-04-06 adapter connector
 One PU tube (4X200)
 One PU tube (6X200)