Eclipse UDC2500 Limit - Controller Failure Symptoms; Table 7-4 Controller Failure Symptoms

Troubleshooting/Service
8/05 UDC2500 Universal Digital Limit ControllerProduct Manual 77
7.6 Controller Failure Symptoms
Introduction
In addition to the error message prompts, there are failure symptoms that can be
identified by noting how the controller displays and indicators are reacting.
Symptoms
Compare your symptoms with those shown in Table 7-4.
Table 7-4 Controller Failure Symptoms
Upper
Display
Lower
Display
Indicators Controller
Output
Probable
Cause
Trouble-
shooting
Procedure
Upper
Display
Lower
Display
Indicators Controller
Output
Probable
Cause
Trouble-
shooting
Procedure
Blank Blank Off None Power Failure 1
OK Displayed
Output
disagrees with
controller output
OK Controller
Output
disagrees with
displayed output
Relay Output 2
OK OK OK External Alarm
function does
not operate
properly
Malfunction in
alarm output
3
Display does not change when a key is pressed Keyboard
Malfunction
4
Controller fails to go into “Slave” operation during communications Communications
Failure
5
OK Displayed
Output
disagrees with
Auxiliary Output
OK
Controller
Auxiliary Output
disagrees
with Displayed
Auxiliary Output
Auxiliary Output 6
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.