System Failure 16; System Failure 18 - GE Giraffe Service Manual

Cause(s)
Defective heater isolation
transformer
Defective DAC circuit on control
board.
Defective solid state relay (SSR)
Defective incubator heater SSR
Defective current sense circuit on
relay board.
Defective 50-pin ribbon cable

4.4.14 System Failure 16

System failure 16 indicates: When the unit performed Power-on Self Test, the incubator heater could not be
turned off.
Cause(s)
If this error occurs
during System
Calibration
Defective incubator
heater SSR
Defective current
sense circuit on relay
board.

4.4.15 System Failure 18

System failure 18 indicates: Defective Variables.
Cause(s)
Defective SRAM circuit on control board.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Action(s)
If voltage is present at primaries but no voltage output at secondaries,
replace the heater isolation transformer.
If failure persists, replace control board.
Power up the unit in service mode. Run status test on the second service
screen and verify that the I/HTROFF (incubator heater off) test fails. If the
status test fails, then it is an SSR problem. If the status test does not fail,
then try the recommended action for a defective current sense circuit on
relay board, below.
Disconnect the black wire (larger diameter) from the AC side of the
incubator heater solid state relay. Run status test. If I/HTROFF test passes
replace the incubator heater SSR. If it still fails reconnect the wire to the
SSR.
Replace relay board.
If failure persists, replace 50 pin ribbon cable.
Action(s)
Reconnect J1, J2 and J4 on the control board. Put JP1 in Normal position. (Refer to
section "3.3 System Calibration" on page 21.) Power up unit in normal operating mode
and follow instructions for the error that occurs.
Disconnect the black wire (larger diameter) from the AC side of the incubator heater
solid state relay. Run status test. If I/HTROFF (incubator heater off) test passes replace
the incubator heater SSR. If it still fails reconnect the wire to the SSR.
If failure persists, replace relay board.
Action(s)
Replace the control board.
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Chapter 4: Troubleshooting
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