Symptom Possible Cause Action
Unit will not power
up, alarm sounds.
Defective scale.
Disconnect scale connector at probe panel. Power cycle the unit.
If error clears replace the scale.
Defective scale harness.
Disconnect scale harness from J7 on the control board. Power
cycle the unit. If error clears replace the scale harness.
Defective Servo Oxygen board.
Disconnect the RS485 harness from J8 on the Servo Oxygen
board. Power cycle the unit. If the error clears, replace the Servo
Oxygen Board.
Defective Servo Oxygen cable.
Disconnect RS485 bus cable from J6 on the control board. Power
cycle the unit. If the error clears, replace the RS485 cable going
to the Servo Oxygen board.
Defective battery.
Remove the electrical enclosure cover and disconnect the
battery. Power down and power up again. If the unit powers up,
replace the 9V battery (66001024600).
Defective power supply. Check power supply voltages. Refer to the Tips section (4.6.4).
Defective power harness to
display board.
Verify power supply voltages at J23 on display driver board.
• +5V 1-2
• +12V 1-3
• +5STBY 1-4
Defective display driver board
Disconnect ribbon cable from J6 on control board. Power up unit.
Girae logo should appear on display. After about 70 seconds
the audible alarm sounds. If the logo does not appear replace
the display driver board.
Defective control board. Replace control board.
Baby Hot or Baby
Cold alarms
activated while unit
is in Manual Mode.
MANUAL TEMP alarm is
selected on the Setup screen
Select OFF for MANUAL TEMP alarm on Setup screen.
Air Temp >38C or
Air Temp >40C
alarm activated
even though
compartment temp
is < alarm.
Alarm is not designed to
automatically reset after
alarm condition is resolved.
Push the alarm silence button to clear the alarm.
Bed warms up
very slowly, may
not reach set
temperature.
One of the bed heater
cartridges is defective.
Feel the heat sink to see if one side is cooler than the other. Use
care, since the heat sink can reach temperatures as great as
121C (250F). Replace the cartridge on the cool side.
Unit always powers
up in service screen
mode.
Defective dipswitch setting
Check position 8 on the control board dipswitch. Should be set to
O position.
Override switch (>37C) on
control panel shorted
Check switch on switch diagnostic screen.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved. 6600-0343-000 104 57
Chapter 4: Troubleshooting
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