4.4.2 System Failure 1
System failure 1 indicates: No Timer2.
Cause(s) Action(s)
The Timer2 circuit of the microprocessor on the control board is defective. Replace the control board.
4.4.3 System Failure 2
System failure 2 indicates: Timer2 too fast.
Cause(s) Action(s)
Defective scale.
Disconnect scale connector at probe panel. Power cycle the
unit. If the error clears, replace the scale.
Defective scale harness.
Disconnect scale harness from J7 on the control board. Power
cycle the unit. If the error clears, replace the scale harness.
There is no line frequency signal to feed timer0 and
timer1 of the microprocessor on the control board, or
the timer2 of the microprocessor on the control board,
is defective.
Power cycle the unit. If system failure 8 appears, refer to the
instruction in this chapter for system failure 8 (section 4.4.8). If
system failure 2 persists, replace the control board.
4.4.4 System Failure 3
System failure 3 indicates: During ADC calibration, the software detected a channel out of range.
Cause(s) Action(s)
During system calibration, J1, J2, and J4 were not
unplugged, or calibration jumper JP1 is not installed
properly.
Before calibrating, make sure J1, J2, and J4 on the control
board are disconnected. Verify JP1 is correctly positioned.
(Refer to system calibration instructions.)
Defective circuit on control board. Replace the control board.
4.4.5 System Failure 5
System failure 5 indicates: The volt reference is out of the 1.171V - 1.259V range.
Cause(s) Action(s)
System calibration required. Perform system calibration.
Defective control board. Replace the control board.
44 6600-0343-000 104 © 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Chapter 4: Troubleshooting
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