System Failure 19; System Failure 20; System Failure 22 - GE Giraffe OmniBed Service Manual

4.4.17 System Failure 19

System failure 19 indicates: No Audio Frequency.
Cause(s)
Defective battery
Defective scale.
Defective scale
harness.
Defective Servo Oxygen
board.
Defective Servo Oxygen
cable.
Defective audio circuit
on control board.
Defective control board Replace the control board.

4.4.18 System Failure 20

System failure 20 indicates: Display WDOG Time Out.
Cause(s)
Display driver board software is not performing
correctly.

4.4.19 System Failure 22

System failure 22 indicates: During operation, neither the radiant heater nor the incubator heater will turn ON.
Cause(s)
Refer to other errors.
Error reading distorted
line signal.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Action(s)
Battery is only used for power fail. Try powering up the unit with the battery disconnected. If
the error clears, replace the battery.
Disconnect scale connector at probe panel. Power cycle the unit. If the error clears, replace
the scale.
Disconnect scale harness from J7 on the control board. Power cycle the unit. If the 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.
Replace socketed IC U22 on control board. If failure persists, replace the control board.
Action(s)
Power down the unit. During the system tests after power-up the unit should detect system
failure 15, or Radiant heater failure or bed heater failure. Follow the instructions in this manual
for those failures.
Check the revision 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). If the relay board is revision 10 or lower, replace with revision 13 or
higher relay board.
If you have replaced the relay board with revision 13 or higher and you still have an
intermittent problem, refer to the instructions in this manual for system failure 15 (section
4.4.13).
Action(s)
Replace the display driver board.
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Chapter 4: Troubleshooting
49