GE Giraffe Service Manual page 88

Chapter 4: Troubleshooting
Alarm Message Meaning
One of the sensors
is reading out
of range (23-
Oxygen Probe 280 millivolts) or
Failure the difference
between the two
O2 sensors is
above 3%.
Servo oxygen
unit has never
been calibrated.
Unit will not
operate until initial
O2 Cal Lost-No
calibration is
O2
performed.
Cell voltage less
than 33 mV.
60
Cause
Defective Sensor(s)
Leak or occlusion in
sensor housing area.
Defective cable or
connection.
Defective Servo O2
board.
Perform oxygen
calibration.
Earlier software
versions did not store
voltages this low.
6600-0356-000 103
Action
In service mode sensor0 and sensor1 should
be 23-280. If outside this range replace the
sensors. If in range ensure oxygen0 and
oxygen1 read within 3% of each other or
replace the sensors.
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.
Measure the voltage at J85.8-J85.7 (sensor0)
and J85.6-J85.7 (sensor1) and compare them
to displayed sensor0 and sensor1. If the
measurement is the same as the displayed,
check the cable and sensor contacts.
If the measurement is not the same as the
displayed, replace the Servo O2 board.
Run calibration.
Replace display software with 1.62 or higher.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.