Datex-Ohmeda Aespire 7900, User'S Reference Manual

Page: 67 / 118

4 Alarms and Troubleshooting
1009-0633-000
4-7
High O
2
Medium O
2
% > alarm high limit
setting.
Is the limit set correctly? What is
the O
2
flow?
Did you just push Flush? Does
the sensor see 21% O
2
in room
air?
Calibrate O
2
sensor.
Replace O
2
sensor.
High Paw High Paw is greater than Plimit.
The ventilator cycles to
expiration. Are Plimit and other controls set
correctly? Look for blockages.
Check the patient connection. Calibrate the flow
sensors.
Replace the receiver
filter.
High Ve Medium The minute volume is greater
than the set high limit. This
alarm is suspended for 9
breaths or one minute after
you change the ventilator
settings. Check patient for spontaneous
breathing. Adjust control
settings. - - -
High Vte Medium VTE is greater than high
alarm limit. This alarm is
suspended for 9 breaths
after you change the
ventilator settings. Check patient for spontaneous
breathing. Check ventilator and
alarm settings. - - -
Insp Flow Sensor Fail Low The system cannot read the
calibration data stored in the
sensor. Operation continues with default
values.
Replace the flow sensor. - - -
Inspiration Stopped High Drive gas safety switch
activated (high internal
pressure) Adjust controls. Check systems
for blockages. - - -
Insp Reverse Flow Medium
(low after
acknowledged) Flow through the inspiratory
sensor during expiration (for
6 breaths in a row). Look at the check valves.
Water build-up in the flow sensor
tubes?
Is a flow sensor tube cracked or
broken?
Replace the inspiratory
check valve.
Check the condition of
the flow sensor.
Internal Ventilator
Clock Too Fast Minimum
shutdown (High) Ventilator malfunction. Ventilate manually. Monitoring is
not reliable. Contact a qualified
service representative.
Internal Ventilator
Clock Too Slow Minimum
shutdown (High) Ventilator malfunction. Ventilate manually. Monitoring is
not reliable. Contact a qualified
service representative.
Invalid Circuit
Module Low Ventilator malfunction. Ventilate manually; monitoring is
not reliable. Contact a qualified
service representative
Message Priority Cause Action/Concerns Repair