Datex-Ohmeda Aestiva 7900 SmartVent Technical Reference Manual page 131

Message Alarm type/
Priority
Inspiration high
Stopped
(2), (3)
Internal Minimum
Ventilator Shutdown
Clock Too
(6)
Fast (7)
Internal Minimum
Ventilator Shutdown
Clock Too
(6)
Slow (7)
Invalid User Alarm
Circuit
Module
Limit Task User Alarm
Light Use
Loss of User Alarm
Backup
Audio
Low Battery User Alarm
Voltage
Low Drive User Alarm
Gas Pres
Low O2 high
1006-0453-000 05/04
Enabling Criteria Alarm Condition
Removal Criteria
Drive gas safety switch
engaged
Ventilator malfunction. Ventilate manually.
Monitoring is not
reliable.
Ventilator malfunction. Ventilate manually.
Monitoring is not
reliable.
The system does not
recognize the type of
circuit module installed.
Normally the system
used the ID tabs to
Identify circuits.
The system is running
on battery power.
No action is required. Turn off the light to save
power.
The audio alarm will not Monitor system
sound for a CPU failure. operation.
Voltage is <11.65V Manually ventilate the
while using battery patient to save power.
power.
The ventilator did not Manually ventilate the
detect a rise in internal patient.
pressure when the flow
valve opened.
In-range O data O < low limit
2 2
available
Alarm condition becomes false or enabling criteria
becomes false.
5 Troubleshooting
Service Repair
Check the breathing circuit.
Check ventilator flow output.
Perform flow sensor calibration.
Perform the pressure limit switch test in the
service screen. If test fails, replace the SIB
board or SIB to CPU cabling
If problem persists, replace the CPU board.
Replace the CPU board.
Replace the CPU board.
Make sure the module is correctly installed.
Look for broken ID tabs or tape on the tabs.
If persists, check:
• circuit identification board
• harness to SIB
• SIB
• cable from SIB to CPU board
Replace the CPU board.
Make sure power is connected and circuit
breaker is closed. Check ventilator fuse.
Make sure that the appropriate gas supplies
(O or air) are connected and pressurized.
2
Check O limit. Is actual O lower than limit
2 2
setting?
Verify O calibration has been done correctly.
2
Does calibration pass?
If calibration does not pass, replace O
sensor.
If there is still a calibration problem, replace
the SIB board.
2
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