4.4.14 System Failure 16
System failure 16 indicates: When the unit performed Power-on Self Test, either the incubator heater or the
radiant heater could not be turned o.
Cause(s) Action(s)
If this error occurs
during System
Calibration
Reconnect J1, J2 and J4 on the control board. Put JP1 in Normal position. (Refer to system
calibration instructions). Power up unit in normal operating mode and follow instructions for
the error that occurs.
Defective solid state
relay (SSR)
Power up the unit in service mode. Run status test on the second service screen and verify
that the I/WHTROFF 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.
To determine which SSR is defective, disconnect an output wire from them one at a time and
rerun the status rest.
Defective radiant
heater SSR
Disconnect the black wire (larger diameter) from the AC side of the radiant heater solid state
relay. Run status test. If I/WHTROFF test passes replace the radiant heater SSR. If it still fails
reconnect the wire to the SSR.
Defective incubator
heater SSR
Disconnect the black wire (larger diameter) from the AC side of the incubator heater solid state
relay. Run status test. If I/WHTROFF test passes replace the incubator heater SSR. If it still fails
reconnect the wire to the SSR.
Defective current sense
circuit on relay board.
If failure persists, replace relay board.
4.4.15 System Failure 17
System failure 17 indicates: When performing Power-on Self Test in System Calibration mode, the radiant
heater could not be turned o.
Cause(s) Action(s)
Reconnect J1, J2 and J4 on the control board. Put JP1 in Normal position. (Refer to system
calibration instructions.) Power up unit in normal operating mode and follow instructions for
the error that occurs.
4.4.16 System Failure 18
System failure 18 indicates: Defective Variables.
Cause(s) Action(s)
Defective SRAM circuit on control board. Replace the control board.
48 6600-0343-000 104 © 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Chapter 4: Troubleshooting
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