Datex-Ohmeda Aestiva 7900 SmartVent Technical Reference Manual page 136

5 Troubleshooting
Message Alarm type/
Priority
Pres/Vol User Alarm
Mon Inactive
Pressure Minimum
Limit Switch Monitoring
Failure
(4.X)
Replace O2 low
Sensor
Schedule low
Service Cal
Select gas medium
outlet
Service User Alarm
Calibration
Software Minimum
Error Shutdown
(6)
Software Immediate
Operating Shutdown
System Error
Software Minimum
Watchdog Shutdown
Failure
(6)
(7)
Sustained Minimum
Airway Shutdown
Pressure
(6)
(7)
5-20
Enabling Criteria Alarm Condition
Removal Criteria
Outlet selection switch
is set to auxiliary gas
outlet.
Connect the patient circuit to the auxiliary gas
outlet or set the switch to the common gas outlet
for normal operation.
A pressure safety switch Ventilate manually.
activated at a Paw <90 Monitoring is still
cmH O and Pmanifold available. Extreme
2
control combinations
<80 cmH O.
2
may cause this alarm.
Sensor connected O < 5%
2
Alarm condition becomes false.
1. Replaced CPU board
2. Calibration data
corrupted
Patient breathing
detected in ACGO -- 3
breaths detected in a
30 sec window
User presses the alarm silence switch.
Internal calibrations are The system is
necessary for maximum operational.
accuracy.
Ventilator malfunction. Ventilate manually.
Monitoring is not
reliable.
Ventilator malfunction. Ventilate manually.
Monitoring is not
reliable.
Time-out or incorrect
code executed
Paw > 100 cm H O for
2
10 seconds.
Service Repair
Check control settings.
Refer to Troubleshooting Flowcharts
(Section 5.5.5, "High intrinsic PEEP
troubleshooting")
Verify O calibration has been done correctly.
2
Does calibration pass?
If calibration does not pass, replace O
If there is still a calibration problem, replace
the SIB board.
Perform all calibrations in service mode.
Check ventilator settings and ACGO switch
position.
Service Mode:
• Perform all calibrations
4.X - Refer to Section 4a.3.24
3.X - Refer to Section 4b.10
Replace:
• Software
• CPU board
Replace:
• Software
• CPU board
Replace the CPU board.
Check tubing for kinks, blockages,
disconnects.
Calibrate the flow sensors.
If persists, check:
• bellows pop-off
• exhalation valve
• SIB
05/04 1006-0453-000
cell.
2