GE Giraffe OmniBed Service Manual page 85

Symptom Possible Cause
Defective scale.
Defective scale harness.
Defective Servo Oxygen board.
Defective Servo Oxygen cable.
Unit will not power
Defective battery.
up, alarm sounds.
Defective power supply.
Defective power harness to
display board.
Defective display driver board
Defective control board.
Baby Hot or Baby
Cold alarms MANUAL TEMP alarm is
activated while unit selected on the Setup screen
is in Manual Mode.
Air Temp >38C or
Air Temp >40C
Alarm is not designed to
alarm activated
automatically reset after
even though
alarm condition is resolved.
compartment temp
is < alarm.
Bed warms up
very slowly, may One of the bed heater
not reach set cartridges is defective.
temperature.
Defective dipswitch setting
Unit always powers
up in service screen
Override switch (>37C) on
mode.
control panel shorted
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Action
Disconnect scale connector at probe panel. Power cycle the unit.
If error clears replace the scale.
Disconnect scale harness from J7 on the control board. Power
cycle the unit. If error clears replace the scale harness.
Disconnect the RS485 harness from J8 on the Servo Oxygen
board. Power cycle the unit. If the error clears, replace the Servo
Oxygen Board.
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.
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).
Check power supply voltages. Refer to the Tips section (4.6.4).
Verify power supply voltages at J23 on display driver board.
• +5V 1-2
• +12V 1-3
• +5STBY 1-4
Disconnect ribbon cable from J6 on control board. Power up unit.
Giraffe logo should appear on display. After about 70 seconds
the audible alarm sounds. If the logo does not appear replace
the display driver board.
Replace control board.
Select OFF for MANUAL TEMP alarm on Setup screen.
Push the alarm silence button to clear the alarm.
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.
Check position 8 on the control board dipswitch. Should be set to
Off position.
Check switch on switch diagnostic screen.
6600-0343-000 104
Chapter 4: Troubleshooting
57