Alarm Message Meaning Cause Action
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 45 psi (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 
section 4.7.3.2. 
Supply valves not 
opening.
Check supply valves. Refer to the Tips section 
4.7.3.1. 
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 Girae control 
board cannot 
communicate with 
Servo O2 board.
Defective Servo O2 
board.
Replace servo O2 board.
Defective Cable.
Check that the cable between the Girae 
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 Tips section 4.7.3.2. 
Defective sensors. Replace the sensors.
FiO2>26%
Elevated O2 levels 
but Servo O2 is 
not turned on.
If other sources of 
oxygen are not in 
use, leak in Servo O2 
system.
Check for valve leak. Refer to the Tips section 
4.7.3. 
SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION
An Electrostatic Discharge (ESD) Susceptibility symbol is displayed to alert service personnel that the 
part(s) are sensitive to electrostatic discharge and that static control procedures must be used to 
prevent damage to the equipment. 
62  6600-0356-000 103  © 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Chapter 4: Troubleshooting