5-21
No “O2 Supply
Failure” alarm
occurs when the O2
pressure is low or
this alarm occurs
when the O2 supply
pressure is normal.
The gas pressure switch
of the O2 supply inlet
assembly is ineffective.
Adjust the pressure switch of the O2 supply
inlet assembly to cause O2 supply pressure to
approach 0.2 MPa as much as possible within
the range of 0.15 to 0.25 MPa when this
alarm occurs. If the adjustment fails, replace
the pressure switch (refer to 5.3.2.3Adjust the
Pressure Switch).
No “Drive Gas
Pressure Low” alarm
occurs when the
drive gas pressure is
low or this alarm
occurs when the
drive gas pressure is
normal.
The pressure switch on
the integrated pneumatic
circuit of the expiratory
valve assembly or the
PEEP safety valve is
ineffective. Or, the filter
on the integrated
pneumatic circuit of the
expiratory valve
assembly is occluded.
Adjust the pressure switch on the integrated
pneumatic circuit of the expiratory valve
assembly to cause drive gas pressure to
approach 0.14 MPa as much as possible
within the range of 0.05 to 0.2 MPa when this
alarm occurs. If the adjustment fails, replace
the pressure switch. If the problem persists
after the pressure switch is replaced, replace
the integrated pneumatic circuit of the
expiratory valve assembly (refer to
5.3.2.3Adjust the Pressure Switch).
5.3.2.1 Test the Pipeline Pressure Gauge and Correct the Regulator
Use the following tools to test the pipeline pressure gauge and regulator of the pipeline gas
supply inlet assembly:
1 MPa (10bar) test pressure gauge (before the test, make sure that the 1 MPa (10bar)
test pressure gauge is in good condition) (quantity: 1)
3106-04-06 adapter connector (quantity: 1)
PU tube (4X200) (quantity: 1)
Test procedures:
I O2 supply inlet assembly:
1. Turn off the pipeline gas supply and bleed the residual pressure through O2 flushing.
2. Pull out No.42 PU tube which connects the O2 supply inlet assembly to other
assembly (Note 1). The end of the tube which connects the O2 supply inlet assembly is
not pulled out but the other end is.
3. Connect the pulled-out tube end to the 1 MPa (10bar) test pressure gauge through
3106-04-06 adapter connector, as shown below.
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