Cause(s) Action(s)
Defective control
board.
Replace control board.
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, follow
the instructions for system failure 8 in 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 section “3.3 System Calibration”
on page 21.)
Defective circuit on control board. Replace the control board.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved. 6600-0356-000 103 39
Chapter 4: Troubleshooting