System Failure 27; System Failure 28; System Failure 29; System Failure 30 - GE Giraffe OmniBed Service Manual

4.4.23 System Failure 27

System failure 27 indicates: Defective non-volatile memory.
Cause(s)
Defective circuit on control board.

4.4.24 System Failure 28

System failure 28 indicates: During operation, the display driver board lost communication with control board.
Cause(s)
Refer to system failure
0.
Defective flat ribbon
cable between control
board and display
board.

4.4.25 System Failure 29

System failure 29 indicates: Defective signal on control board.
Cause(s)
Defective control board

4.4.26 System Failure 30

System failure 30 indicates: Mains voltage reading LV1 is outside of the expected range.
Cause(s)
Mains Voltage Comp Circuit is not calibrated correctly.
High or low mains voltage. This failure is triggered if the
mains voltage is outside the following ranges:
• 100V: 80-115V
• 115V: 95-132V
• 230V: 195-270V
Defective 50 pin ribbon cable between the relay and
control board.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Action(s)
Power down the unit, during the self-test the unit should detect system failure 0. Follow the
instructions for system failure 0.
If system failure 28 persists without system failure 0, replace the flat ribbon cable between
control board and display board.
Action(s)
Replace the control board.
Action(s)
Replace the control board.
Action(s)
Calibrate the line voltage.
Connect to proper mains voltage source
Check for continuity on pin 48 and 49 (LineComp1,2) If
defective replace cable.
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Chapter 4: Troubleshooting
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