System Failure 55; System Failure 98; System Failure 99; Troubleshooting Symptoms - GE Giraffe Service Manual

4.4.33 System Failure 55

System failure 55 indicates: Display board On Line Self Test Failure.
Cause(s)
Defective display driver board.

4.4.34 System Failure 98

System failure 98 indicates: Overflow.
Cause(s)
Software on the control board is not performing
correctly.

4.4.35 System Failure 99

System failure 99 indicates: Logic problem on the control board.
Cause(s)
Software on the control board is not performing
correctly.

4.5 Troubleshooting Symptoms

Symptom Possible Cause
Defective speaker or
harness.
No audio alarm.
Audio driver circuitry on
control board is defective.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Action(s)
Replace the display driver board.
Action(s)
Replace the control board.
Action(s)
Replace the control board.
Action
Use an ohmmeter to verify the speaker resistance is about
8 ohms at relay board connector J40, pins 5-6. If defective,
determine whether speaker or harness is defective as
follows:
• If the shroud assembly is in two pieces, raise the lower
shroud to access the speaker connector, and measure the
resistance.
• If the shroud assembly is in three pieces, take off the back
cover, disconnect the lower shroud from the base plate, lean
the shroud forward to access the speaker connector, and
measure the resistance.
Replace the control board.
6600-0356-000 103
Chapter 4: Troubleshooting
49