Datex-Ohmeda Aespire 7900, User'S Reference Manual

Page: 71 / 118

4 Alarms and Troubleshooting
1009-0633-000
4-11
Pressure Limit Switch
Failure Minimum
monitoring
(Medium) A pressure safety switch
activated at a Paw <90
cmH
2
O and Pmanifold <80
cm H
2
O.
Ventilate manually. Monitoring is
still available. Extreme control
combinations may cause this
alarm.
Check control settings. Contact a qualified
service representative.
Replace O
2
Sensor Low O
2
% < 5% Makes sure patient receives O
2
.
Does the sensor see 21% O
2
in
room air? Use different monitor.
Calibrate O
2
sensor.
Replace O
2
sensor.
Select Gas Outlet Medium Fresh gas may not flow to the
patient. Auxiliary gas outlet
is On, but flow sensors have
seen 3 breaths in patient
circuit during the last 30
seconds. Select the circle breathing
system or connect the patient
circuit to the auxiliary outlet. Note: the bag arm will
not ventilate a patient
at the auxiliary outlet.
Service Calibration Low Internal calibrations are
necessary for maximum
accuracy. The system is operational.
Operation continues with default
values. Contact a qualified
service representative.
Software Error Minimum
shutdown (High) Ventilator malfunction. Ventilate manually. Monitoring is
not reliable. Contact a qualified
service representative.
Software Watchdog
Failure Minimum
shutdown (High) Ventilator malfunction. Ventilate manually. Monitoring is
not reliable. Contact a qualified
service representative.
Sustained Airway
Pressure Minimum
shutdown (High) Paw > 100 cmH
2
O for 10
seconds.
Check tubing for kinks,
blockages, disconnects. Calibrate the flow
sensors.
Sustained Paw High Paw > sustained pressure
limit for 15 seconds
c
.
Check tubing for kinks,
blockages, disconnects. Calibrate the flow
sensors.
System Leak? Medium Delivered volumes do not
match set volumes. Look for leaks in the breathing
system. Compare set to
delivered volumes. Calibrate the flow
sensors.
Drain water buildup
from the breathing
system.
Vaux_ref Out-of-
Range Minimum
shutdown (High) Ventilator malfunction. Ventilate manually. Monitoring is
not reliable. Contact a qualified
service representative.
Vext_ref Out-of-
Range Minimum
shutdown (High) Ventilator malfunction. Ventilate manually. Monitoring is
not reliable. Contact a qualified
service representative.
Message Priority Cause Action/Concerns Repair