System Failure 23; System Failure 25; System Failure 26 - GE Giraffe OmniBed Service Manual

Chapter 4: Troubleshooting

4.4.20 System Failure 23

System failure 23 indicates: During operation the system was unable to turn OFF either the radiant heater or
the incubator heater.
Cause(s)
Other errors.
Defective relay board.

4.4.21 System Failure 25

System failure 25 indicates: Fan rotation is not being detected.
NOTE: System failure 25 and FAN FAILURE are both triggered by the optical fan sensor not detecting the fan.
If this occurs at power-up a system failure 25 will activate. If it occurs after the power tests are completed the
FAN FAILURE alarm will activate.
Circumstance(s)
Fan is not turning
Fan is turning

4.4.22 System Failure 26

System failure 26 indicates: During the power up tests, the system was unable to turn off safety relay 1.
Cause(s)
Defective relay board.
50
Action(s)
Power down the unit. During the system tests after power-up the unit should detect system
failure 16. Follow the instructions in this manual for this failure.
If system failure 23 persists without system failure 16, replace the relay board.
Cause(s)
Fan not connected.
Fan or fan hub not
seated properly.
Defective relay board.
Defective fan motor.
Fan is turning too slow.
Old design fan.
Defective or obstructed
optical sensor. Sensor
holder or sensor gasket
dirty or crazed.
Defective 50 pin
ribbon cable between
the relay and control
board.
Defective relay board.
6600-0343-000 104
Action(s)
Check jack.
Verify the fan hub is properly seated all the way down on the fan
shaft and is seated in the groove at the top of the hub.
Replace relay board.
Replace fan motor.
Check fan speed in service mode, should be about 1500 RPM in high
fan speed. Note that this RPM measurement is only tested during the
power up tests.
Replace with new design fan. The new fan can be identified by the
grooves molded in the 2 black areas on the bottom of the fan (side
facing the heat sink). The old fan has smooth surfaced black areas.
Check that sensor, sensor holder, and gasket and free of dirt or other
contaminants. Clean or replace.
Check for continuity on pin 9 (AIRFLOW). If defective replace cable.
Replace relay board.
Action(s)
Replace the relay board.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.