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Troubleshooting/Service
4/07 UDC2500 Universal Digital Controller Product Manual 169
Procedure #5
Table 7-9 explains how to troubleshoot Current/Time or Time/Current Proportional
Output failure.
Table 7-9 Troubleshooting Current/Time or Time/Current Proportional
Output Failure
Step What to do How to do it
1
Make sure the controller is configured
for Time/Current or Current/Time
Proportional output.
Make Output Algorithm Set Up group function
prompt OUT ALG = TCUR or CURT.
Refer to
Section 3 – Configuration.
2
Check the field wiring. Make sure the NO or NC contact wiring selection
is correct.
Refer to
Section 2 - Installation for details.
3
Check the relay output. Put the controller into Manual mode. Vary the
output above and below the present value.
Observe OUT1 indicator on the operator interface.
Listen for a click from the relay when the OUT1
indicator changes state.
4
Check the Current Proportional
Output.
Put the controller into Manual mode and change
the output from 0 % to 100 % (4-20 mA). Use a DC
milliammeter at the rear terminals to verify the
output.
5
Recalibrate the controller. Refer to
Section 6 - Output Calibration for details.
6
Change relay and/or Current Output
boards.
Installation instructions supplied with new board.