5 Troubleshooting
1006-0453-000 05/04
5-15
Inspiration
Stopped
(2), (3)
high
Drive gas safety switch
engaged
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.
Internal
Ventilator
Clock Too
Fast (7)
Minimum
Shutdown
(6)
Ventilator malfunction.
Ventilate manually.
Monitoring is not
reliable.
Replace the CPU board.
Internal
Ventilator
Clock Too
Slow (7)
Minimum
Shutdown
(6)
Ventilator malfunction.
Ventilate manually.
Monitoring is not
reliable.
Replace the CPU board.
Invalid
Circuit
Module
User Alarm
The system does not
recognize the type of
circuit module installed.
Normally the system
used the ID tabs to
Identify circuits.
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
Limit Task
Light Use
User Alarm
The system is running
on battery power.
No action is required. Turn off the light to save
power.
Loss of
Backup
Audio
User Alarm
The audio alarm will not
sound for a CPU failure.
Monitor system
operation.
Replace the CPU board.
Low Battery
Voltage
User Alarm
Voltage is <11.65V
while using battery
power.
Manually ventilate the
patient to save power.
Make sure power is connected and circuit
breaker is closed. Check ventilator fuse.
Low Drive
Gas Pres
User Alarm
The ventilator did not
detect a rise in internal
pressure when the flow
valve opened.
Manually ventilate the
patient.
Make sure that the appropriate gas supplies
(O
2
or air) are connected and pressurized.
Low O2
high
In-range O
2
data
available
O
2
< low limit
Check O
2
limit. Is actual O
2
lower than limit
setting?
Verify O
2
calibration has been done correctly.
Does calibration pass?
If calibration does not pass, replace O
2
sensor.
If there is still a calibration problem, replace
the SIB board.
Alarm condition becomes false or enabling criteria
becomes false.
Message
Alarm type/
Priority
Enabling Criteria
Alarm Condition
Service Repair
Removal Criteria
Summary of Contents for Aestiva 7900 SmartVent
Page 1: ...Aestiva 5 7900 Anesthesia Ventilator Technical Reference Manual ...
Page 44: ...Notes 2 28 05 04 1006 0453 000 ...
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