Troubleshooting/Service
3/07 UDC3500 Universal Digital Controller Product Manual 323
7.7.4 Procedure #4 – Time Proportional
Table 7-8 explains how to troubleshoot Time Proportional Output failure.
Table 7-8 Troubleshooting Time Proportional Output Failure
Step What to do How to do it
1
Make sure the controller is configured
for Time Proportional output.
Make Output Algorithm Set Up group function
prompt OUT ALG (Loop 1) or OUT2 ALG (Loop 2)
= RLY or RLYD.
Refer to Section 3.14.
2
Check the field wiring. Make sure the NO or NC contact wiring is correct.
Refer to Section 2 – Installation for details
.
3
Check the output. Put the controller into Manual mode. Vary the
output above and below the present value.
Observe OUT1 indicator (Loop 1) or OUT3
indicator (Loop 2) on the operator interface.
Contact should change state. 0 % open, 100 %
closed. Listen for a click from the relay when the
OUT1 or OUT3 indicator changes state.
4
Check relay. Change relay.
5
Change relay board. Installation instructions supplied with the new
board.
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