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troubleshootinG
If a Fault condition is indicated on the UD10 faceplate,
the nature of the fault can be determined by using
the magnetic tool to navigate to the appropriate Fault
screen.
Refer to the Menu in the appropriate Appendix
of this manual for the path to the proper Fault
screen.
Shortcut: From the main display screen, touch
the magnet to the "Previous" switch to go directly
to the Fault screen.
Display Faults
input Loop FLT
Fault in sensor or sensor loop
Output Loop FLT
Fault in 4-20 mA output loop
EE Fault
Fault in non-volatile memory
ADC Ref Fault
ADC reference voltage too high or low
24V Fault
Problem in 24 volt power supply or power wiring
Flash Fault
FLASH memory Fault
RAM Fault
Fault in volatile memory
WDT Fault
Watchdog timer is non-functional
12V Fault
12 volt internal power supply out of tolerance
5V Fault
5 volt internal power supply out of tolerance
3V Fault
3 volt internal power supply out of tolerance
Note: A fault condition will cause an oxygen detector to generate an alarm output as the decreasing 4-20 mA signal passes
through the alarm range.
4.3
noTe
Table 3—Troubleshooting Guide - Display Faults
Description
Example:
For a Display (UD10) related fault:
Main Menu > Display Status > Fault/Status > Fault
For a Device (Sensor) related fault:
Main Menu > Device Status > Fault/Status > Sensor Fault
When the active fault has been identified, refer to the
Troubleshooting Tables for a description of the fault and
suggested corrective action.
Refer to Table 3 for Display Faults and Table 4 for Device
Faults.
Check sensor wiring.
Calibrate sensor.
Ensure that sensor type matches configuration.
Check 4-20 mA loop wiring for shorts or opens.
Return to factory.
Return to factory.
Check power wiring and output voltage of power
supply.
Return to factory.
Return to factory.
Return to factory.
Check power source.
Return to factory.
Check power source.
Return to factory.
Check power source.
Return to factory.
13
Recommended Action
95-8618
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