Controller Failure Symptoms; Table 7-4 Controller Failure Symptoms - Honeywell UDC2300 Product Manual

Troubleshooting/Service
Lower
Display
IN1RNG Input 1 out of range. The process input
is outside the range limits.
PV out of range.
PV LIM
PV = INP1 + INP1 BIAS

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.
Upper
Display Display
Blank
OK
Displayed
disagrees with
controller
OK
Display does not function when a key is pressed
58
Reason for Failure

Table 7-4 Controller Failure Symptoms

Lower Indicators
Blank Off
OK
Output
output
OK OK
UDC2300 Limit Controller Product Manual
How to Correct the Problem
1. Make sure the range and actuation are
configured properly.
2. Check the input source.
3. Restore the factory calibration.
(See Subsection 6.6.)
4. Field calibrate.
See Section 6- Input Calibration.
1. Make sure the input signal is correct.
2. Make sure the Bias settings are correct.
3. Recheck the calibration. Use Bias of 0.0
Controller Probable
Output Cause
None Power Failure
Relay Output
Controller
Output
disagrees with
displayed
output
External Alarm Malfunction in
function does alarm output
not operate
properly
Keyboard
Malfunction
Trouble-
shooting
Procedure
1
2
3
4
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