Honeywell UDC2500 manual Procedure #5, Refer to Output Calibration for details

Troubleshooting/Service

Procedure #5

Table 7-9explains 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	Make Output Algorithm Set Up group function
	for Time/Current or Current/Time	prompt OUT ALG = TCUR or CURT.
	Proportional output.	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	Put the controller into Manual mode and change
	Output.	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	Installation instructions supplied with new board.
	boards.

4/07 UDC2500 Universal Digital Controller Product Manual 169