Datex-Ohmeda Aestiva 7900 SmartVent, Technical Reference Manual

Page: 130 / 204

5 Troubleshooting
5-14 05/04 1006-0453-000
High O2 medium In-range O
2
data
available and alarm
limit not = off
O
2
> high limit Check O
2
limit. Is actual O
2
higher than limit
setting?
Verify O
2
calibration has been done correctly.
Does calibration pass?
If calibration does not pass, replace O
2
cell.
If there is still a calibration problem, replace
the SIB board.
Alarm condition becomes false or enabling criteria
becomes false.
High Paw
(2) high
(5) In-range P
aw
data
available
P
aw
> P
limit
Check Pressure limit setting is not set too low
for ventilator settings and breathing circuit.
Check the breathing circuit for occlusions.
Perform flow sensor calibration.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Alarm condition becomes false for 15 seconds or
until the end of the next full inspiratory cycle.
High V
E
medium In-range flow data
available and alarm
limit not = off V
E
> high limit Check ventilator settings and volume output.
Check the breathing circuit and flow sensor
connections.
Perform flow sensor calibration.
Replace the flow sensors.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Alarm condition becomes false or volume alarms
state transition to standby (or off).
High V
TE
medium In-range flow data
available and alarm
limit not = off V
TE
> high limit Check ventilator settings and volume output.
Check the breathing circuit and flow sensor
connections.
Perform flow sensor calibration.
Replace the flow sensors.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Alarm condition becomes false or volume alarms
state transition to standby (or off).
Insp Flow
Sensor Fail User Alarm The system cannot read
the calibration data
stored in the sensor. Operation continues
with default values. Replace the flow sensor.
Insp Reverse
Flow
(5) medium
(1) In-range flow data
available in mechanical
ventilation Negative flow on
inspiratory sensor
during expiration in
circle system Check flow sensor connections for “No Flow
Sensor” alarm.
Check the breathing circuit
Perform flow sensor calibration.
Check insp/exp check valves.
Replace the flow sensors.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Two consecutive breaths measured with “correct”
flow seen by flow sensors
Message Alarm type/
Priority Enabling Criteria Alarm Condition Service Repair
Removal Criteria