Datex-Ohmeda Aespire 7900 User's Reference Manual page 66

Aespire 7900
Message Priority
Check Flow Sensors Medium
(low after
acknowledged)
Circuit Leak Audio Low
Off
Connect O Sensor Low
2
CPU Failure Minimum
shutdown (High)
CPU Internal Error Minimum
shutdown (High)
Display Voltage Out- Minimum
Of-Range shutdown (High)
Exp Flow Sensor Fail Low
Exp Reverse Flow Medium
(low after
acknowledged)
Flow Valve (DAC) Minimum
Failure monitoring
Flow Valve (current) (Medium)
Failure
Gas Inlet Valve Minimum
Failure shutdown (High)
Hardware Watchdog Minimum
Failure shutdown (High)
4-6
Cause
No flow or negative flow on
inspiratory sensor during
inspiration in a circle system
or negative flow on
expiratory sensor in
expiration (for 6 breaths in a
row).
Control setting on the Alarm
limit menu.
The O sensor is not
2
connected to the cable.
Ventilator malfunction.
Ventilator malfunction.
Ventilator malfunction.
The system cannot read the
calibration data stored in the
sensor.
Flow through the expiratory
sensor during inspiration (for
6 breaths in a row).
Ventilator malfunction.
Ventilator malfunction.
a
Ventilator malfunction.
Action/Concerns
Are the flow sensors correctly
installed?
Water build-up in the flow sensor
tubes?
Is a flow sensor tube cracked or
broken?
This message tells you that the
audio alarm for circuit leaks was
turned off.
Connect the sensor.
Ventilate manually. Monitoring is
not reliable.
Ventilate manually. Monitoring is
not reliable.
Ventilate manually. Monitoring is
not reliable.
Operation continues with default
values.
Replace the flow sensor.
Look at the check valves.
Water build-up in the flow sensor
tubes?
Is a flow sensor tube cracked or
broken?
Ventilate manually. Monitoring is
still available.
Ventilate manually. Monitoring is
still available.
Ventilate manually. Monitoring is
not reliable.
Repair
Inspect one way valves
(breathing circuit
module).
Replace flow sensor
module. Check the
condition of the flow
sensor and its tubing.
- - -
Contact a qualified
service representative
to replace the cable.
Contact a qualified
service representative.
Contact a qualified
service representative.
Contact a qualified
service representative.
- - -
Replace the expiratory
check valve.
Check the condition of
the flow sensor.
Contact a qualified
service representative.
Contact a qualified
service representative.
Contact a qualified
service representative.