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04/08 UDC3200 Universal Digital Controller Operator Manual 81
5.2 Controller Failure Symptoms
Upper
Display
Lower
Display
Indicators Controller
Output
Probable
Cause
Blank Blank Off None Power Failure
OK OK Current
Proportional Output
OK OK Position
Proportional or
TPSC Output
OK OK Time Proportional
Output
OK
Displayed
Output
disagrees
with Controller
Output
OK
Controller
Output
disagrees
with Displayed
Output
Current/Time
Proportional Output
OK OK OK External Alarm
function does
not operate
properly
Malfunction in
alarm output
Display does not change when a key is pressed Keyboard
Malfunction
Controller fails to go into “Slave” operation during communications Communications
Failure
OK Displayed
Output
disagrees with
Auxiliary Output
OK
Controller
Auxiliary Output
disagrees
with Displayed
Auxiliary Output
Auxiliary Output
Other symptoms
If a set of symptoms or prompts other than the one you started with appears while
troubleshooting, re-evaluate the symptoms. This may lead to a different
troubleshooting procedure.
If the symptom still persists, refer to the installation section in this manual to ensure
proper installation and proper use of the controller in your system.