504-2033 Iss 1j 11 April 2005
9. Check the Condition of the Patient Valve
i) Check the Patient Valve assembly for cracks, splits and scoring to the connection faces.
ii) Disassemble the Patient Valve by unscrewing the two parts of the body and carefully
remove the valve element (lip membrane). Inspect the element by gently stretching,
looking for splits or tears. Replace if necessary.
iii) Carefully remove the annular disc surrounding the patient connector (200D only).
Inspect the element as ii) above. Replace if necessary.
iv) Reassemble the Patient Valve ensuring that the valve element is inserted the
correct way round and that the annular disc is correctly seated.
v) Recommend replacement if necessary.
10. Check the performance of the paraPAC P200/200D/220D (including alarm functions)
10.1 Check function of the Main Pneumatic Switch
i) Check that the Main Pneumatic switch is in the 'Off' or 'Demand' position.
ii) Without a gas supply connected to the ventilator module, select the 'On' or
'CMV/Demand' position.
iii) The gas supply indicator will stay red but the alarm LEDs will illuminate in sequence,
starting bottom left and rotating in a clockwise direction. After all 6 LEDs have lit a
Medium Priority alarm will sound and continue for 1 minute. If the ventilator is still
left switched on the alarm system will shut down.
iv) Connect the ventilator to an oxygen cylinder or supply (minimum requirement 60L/min
at 305 kPa ≈ 3 bar).
v) Select the ‘Off’ or ‘Demand’ position.
vi) Open the cylinder valve slowly. The gas supply indicator should now change from red
to white if the supply pressure is above the minimum specified.
vii) Select the 'On' or 'CMV Demand' position. The ventilator should now begin to cycle
and the alarm will go through the test sequence described in iii). The yellow Silence
LED (bottom right) will illuminate and no sound will be generated for 60 seconds.
After the 60 seconds silence the yellow Disconnect/Low pressure LED (top right) will
illuminate and continue to flash and a Medium Priority alarm will sound every 10
seconds. After a further 60 seconds, if no action is taken, the repeat rate will increase
progressively during the following 60 seconds to once every 5 seconds.
viii) Select the 'Off' or 'Demand' position and the ventilator should stop cycling. All the
alarm lights and audible signals should cease.
ix) If the ventilator continues to cycle after it has been switched off, then the Main
Pneumatic switch is leaking and must be repaired or replaced.
x) Remove the battery and insert a standard 1.5v AA size battery in its place. Select 'On'
or ‘CMV/Demand’. The alarms should show as in viii) above but the low battery light
should also flash.
xi) Select 'Off' or ‘Demand’. Refit the original battery.
xii) Select the 'On' or CMV/Demand' position.
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