Honeywell UDC2800 Product Manual page 260

Chapter 8 - Troubleshooting/Service
Lower Display
Input 1 Fail
Input 2 Range
Input 2 Fail
PV Limit
260
Reason for Failure
process input is outside the
range limits.
Two consecutive failures of
input 1 integration; i.e., cannot
make analog to digital
conversion. This will happen if:
Upscale or Downscale
l
burnout is selected and the
input is open
Input not configured
l
correctly for the sensor
being used
Calibration test failed
l
Input source is grossly out of
l
range.
Input 2 out of range. The
remote input is outside the
range limits.
Two consecutive failures of
input 2 integration. i.e., cannot
make analog to digital
conversion.
PV in engineering unit (with
ratio and bias) is out of limit.
PV limit is same as burnout
How to Correct the Problem
actuation are configured
properly.
2. Check the input source.
3. Restore the factory calibration.
(See Restore Input Factory
Calibration for more
information.)
4. Field calibrate. See Input
Calibration for more
information.
1. Make sure the actuation is
configured correctly. See
Configuration for more
information.
2. Make sure the input is correct
and that it has not burned-out
(opened).
3. Check for gross over-ranging
with a multimeter
4. Restore factory calibration. See
Restore Input Factory
Calibration for more
information.
Same as Input 1 Range above.
Same as Input 1 Fail above.
1. Make sure the input signal is
correct.