Additional Troubleshooting Tips; Raising And Lowering The Canopy Or Elevating Base - GE Giraffe OmniBed Service Manual

Chapter 4: Troubleshooting
Symptom Possible Cause
Defective circuit on control
board (Unbiased RS485 bus
Screen refreshes
during idle state).
every few seconds
while scale is Defective scale.
attached.
Defective scale harness.
Noise from speaker Microprocessor does not hold
on power down. reset during power off.
Fan is running in This is normal condition for
high speed but 90 minutes after power up, 45
no FAN ALWAYS minutes after transition from
IN HIGH SPEED open to closed bed mode,
message and the and during other conditions
Boost Air Curtain as determined by the heat
Indicator is not lit. control software.
Tilt ball not engaged in finger
Bed will not lock in
pocket latch.
tilt position.
Tilt brake pad failure.
Baby Cold or Baby
Hot Alarm does not
Manual Temp. Alarm is
trigger at 0.5ºC or
disabled on Service Screen.
1.0ºC in Air Control
mode.
Humidifier reservoir
is crazed (has Sterilization
hairline cracks).
Humidifier reservoir
Use of tap water
has scaling.

4.6 Additional Troubleshooting Tips

Following are tips on taking many of the measurements and diagnosing the failures that are referred to in the
troubleshooting charts. For some tips it may be necessary to determine the revision level of the relay board.
The revision code is located in a triangle printed on the component side of the PCB. Refer to relay board Figure
6-41 (revision 10 or higher) and Figure 6-42 (revision 9 or lower).

4.6.1 Raising and Lowering the Canopy or Elevating Base

In the event of an OmniBed system failure, it may be possible to raise or lower the canopy or the elevating base
in the service mode. Hold down the override button (>37) to bring up the service screen. The pedals are now
activated to assist in troubleshooting or transportIf the switches still do not operate it may be possible to raise
the canopy and raise or lower the elevating base using the pedal function on page 2 of the service screen.
58
Action
Replace control board with revision 17 or higher.
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.
If noise is excessive, replace control board with revision 17 or
higher.
To check HIGH and LOW fan speed, power up the unit. After the
power up sequence is complete, hold down the Boost Air Curtain
button and press the decrease temperature button to place the
unit into low fan speed. The Boost Air Curtain button will now
toggle the fan between high and low speeds.
Tilt the head of the bed platform all the way down while holding
the latch open, then let the latch close to capture the tilt ball.
(Refer to "Disassembly for complete cleaning" in the Operation
and Maintenance manual.)
Replace the tilt brake .
Enable Manual Temp. alarm.
Replace humidifier reservoir.
Replace humidifier reservoir.
6600-0343-000 104
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.