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Aespire 7900
Message
Priority
Limit Task Light Use
Low
Loss of Backup
Medium
Audio
(low after
acknowledged)
Low Battery Voltage
Medium
Low Drive Gas Pres
Medium
Low O
High
2
Low Paw
Medium
Low Ve
Medium
Low Vte
Medium
Manifold Pressure
Minimum
Sensor Failure
monitoring
(Medium)
4-8
Cause
The system is running on
battery power. Turn off the
light to save power.
The audio alarm will not
sound for a CPU failure.
Voltage is <11.65V while
using battery power.
The ventilator did not detect
a rise in internal pressure
when the flow valve opened.
O
% < alarm low limit setting Is the limit set correctly? Is the
2
Paw does not rise at least 4
cm from the lowest pressure
measured during the last 20
seconds.
Exhaled minute volume <low
limit alarm setting. This
alarm is suspended for 9
breaths or one minute after
you change the ventilator
settings.
Exhaled tidal volume <low
limit alarm setting. This
alarm is suspended for 9
breaths after you change the
ventilator settings.
Ventilator malfunction.
Action/Concerns
Turn off the light to extend
battery backup.
Monitor system operation.
Manually ventilate the patient to
save power.
Manually ventilate the patient.
O
flow sufficient? Does the
2
sensor see 21% O
in room air?
2
Are circuit connections OK? Look
at the Paw gauge on the
absorber.
Check patient condition. Check
tubing connections.
Check alarm settings.
Check patient condition. Check
tubing connections. Check alarm
settings.
Ventilate manually.
Repair
- - -
Contact a qualified
service representative.
Make sure power is
connected and circuit
breakers are closed.
Contact a qualified
service representative.
Make sure that the
appropriate gas
supplies (O
or Air) are
2
connected and
pressurized.
Calibrate O
sensor.
2
Replace O
sensor. As
2
sensors wear out, the
measured % O
2
decreases.
Look for circuit
disconnection.
- - -
- - -
Contact a qualified
service representative.
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