Bed Up/Down Pedal Switches Disabled" Alarm; Down Pedal Pressed" Alarm; Fan Always In High Speed" Alarm; Fan Failure" Alarm - GE Giraffe Service Manual

4.3.9 "Bed Up/Down Pedal Switches Disabled" Alarm

Cause or Circumstances
Bed up/down pedal
switches have been
disabled in nurse setup
screen or service screen
and pedal is pressed.

4.3.10 "Down Pedal Pressed" Alarm

Cause or Circumstances
The bed down pedal switch
was pressed and held on
during power up.
Other

4.3.11 "Fan Always in High Speed" Alarm

Cause or Circumstances
Software cannot read
temperature of the heat
sink sensor in incubator
heat sink.

4.3.12 "Fan Failure" Alarm

Cause or Circumstances
Fan rotation is not being
detected.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Failure
None
Failure
None
Bed down pedal switch
has failed
Failure
Defective heat sink sensor
or harness.
Defective control board.
Failure
Optical fan sensor not
detecting the fan
Action
When pedal is released, the alarm deactivates.
NOTE: If the bed up/down pedal switches are
disabled in the service screen and you wish to use
them, you can reactivate them only in the service
screen.
Action
When the bed down pedal switch is released, the
alarm deactivates. If alarm silence button is pressed
or the pedal remains on for 100 seconds the Bed
Down Pedal Failure alarm activates and the bed
down pedal switches are disabled. Shut down the
unit and power up to clear failure.
Refer to section 4.3.8 for troubleshooting
information.
Action
Check the heat sink temperature sensor resistance
in service mode. You can also check heat sink
sensor resistance by disconnecting the harness
from J3 at the control board. Measure between pins
1 and 2. Refer to the Tips section 4.6.5.
If defective, remove the chassis cover and
disconnect the harness from heat sink sensor.
Measure sensor resistance at pins 1-2 on the
sensor harness to determine if sensor or harness is
defective.
If the heat sink sensor and harness measure OK,
then replace the control board.
Action
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.
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Chapter 4: Troubleshooting
35