Alarm Message Meaning
Cause
Action
Oxygen System
Failure 4
Analog to digital
converter circuit
self test failed.
The reading
of Vtest is out
of the valid
range:1.216V-
1.254V.
Defective Servo O2 board.
Replace servo O2 board.
Check O2 supply
After calibration,
both supply
valves are
opened and after
approximately 20
seconds, sensor1
reading is not
greater than 23%.
O2 supply is not connected.
Verify O2 supply, minimum 45psi (310kPa) is
connected to the inlet.
Kinked hoses in sensor
housing.
Check hoses.
Oxygen System
Failure 5
Check O2 Supply
alarm has been
silenced twice
and the sensor1
reading is still not
greater than 23%.
O2 supply is not connected.
Verify O2 supply, minimum 45psi (310 kPa) and
45 L/min is connected to the inlet.
Calibration valve stuck in
calibration position.
Check the calibration valve. Refer to the Tips
Supply valves not opening.
Check supply valves. Refer to the Tips section
Leak or occlusion in sensor
housing area.
Be sure sensor housing is seated properly and
the retaining screws are tight. Be sure sensor
gaskets are in place and the tubing is seated
correctly in the connectors. Check to be sure that
the two vents in the infant compartment under
the bed are not occluded.
Oxygen System
Failure 6
The Giraffe
control board
cannot
communicate
with Servo O2
board.
Defective Servo O2 board.
Replace servo O2 board.
Defective Cable.
Check that the cable between the Giraffe control
board and the Servo O2 board is seated properly.
Oxygen System
Failure 7
Power up test
detected a
problem with the
watchdog circuit.
Defective Servo O2 board.
Replace Servo O2 board.
Calibration failed
In calibration
mode, after 5
minutes, both
sensors are
not reading
between 23 and
55 millivolts so
the unit cannot
calibrate.
Calibration valve is not
opening or the calibration
fan is not turning on.
Check the calibration valve and fan. Refer to the
Defective sensors.
Replace the sensors.
68
6600-0343-000 104
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Chapter 4: Troubleshooting
Summary of Contents for Giraffe OmniBed
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