Datex-Ohmeda Aestiva 7900 SmartVent, Technical Reference Manual

Page: 134 / 204

5 Troubleshooting
5-18 05/04 1006-0453-000
O
2
sensor
out of circ
User Alarm No breathing circuit
module installed. Install a breathing circuit module and an O
2
sensor.
On Battery -
Power OK? User Alarm The mains supply is not
connected or has failed
and the system is using
battery power. Ventilate manually to
save power. At full
charge, the battery
permits approx. 30 min
of mechanical
ventilation. Make sure power is connected and circuit
breaker is closed. Check ventilator fuse.
Patient
Circuit Leak? User Alarm Exhaled volume <50%
of inspired volume for at
least 30 seconds
(mechanical
ventilation). Check breathing circuit and flow sensor
connections.
Paw < -10
cm H
2
O
high
(5) In-range Paw data
available Paw < -10 cm H
2
O Check the breathing circuit.
Perform flow sensor calibration (10).
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Alarm condition becomes false.
PEEP Not
Achieved low In-range Paw data
available Pmin does not reach
within 2
cm H
2
O
of
PEEP by end of
mechanical expiration
for 6 breaths in a row.
Check settings for not enough expiration time.
Check the breathing circuit.
Occlusions
Check scavenging
Check ventilator output with PEEP off
Perform flow sensor calibration.
Check that the patient airway pressure display
matches the airway pressure gage. If they
match, the problem may be pneumatic,
(supply pressure, regulator, inlet or flow valve,
etc.).
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Alarm condition becomes false or any control
setting changed (except Plimit) or mechanical
ventilation transition on to off.
Message Alarm type/
Priority Enabling Criteria Alarm Condition Service Repair
Removal Criteria