Troubleshooting/Service
102 UDC2300 Controller Product Manual 12/00
Installation related problems
Read the Installation section in this manual to make sure the UDC2300 has been properly
installed. The installation section provides information on protection against electrical
noise, connecting external equipment to the controller, and shielding and routing external
wiring.
ATTENTION
System noise induced into the controller will result in diagnostic error
messages recurring. If the diagnostic error messages can be cleared, it indicates a “soft”
failure and is probably noise related.
If system noise is suspected, completely isolate the controller from all field wiring.
Use calibration sources to simulate PV and check all controller functions; i.e. Gain, Rate,
Reset, Output, Alarms, etc.
Application related problems
Review the application of the controller; then, if necessary, direct your questions to the
local sales office.
Hardware and software related problems
Use the troubleshooting error message prompts and controller failure symptoms to
identify typical failures which may occur in the controller. Follow the troubleshooting
procedures to correct them.
10.2 Troubleshooting Aids
Overall error messages
An error message can occur
• at power-up, see Subsection 10.3.
• when the Status Tests are requested. See Subsection 10.4.
• during continuous background tests while in normal operation. See Subsection 10.5.
Controller failure symptoms
Other failures may occur that deal with the Power, Output, or Alarms. Refer to the
controller failure symptom in Table 10-4 to determine what is wrong and the
troubleshooting procedures to use to correct the problem.
Check installation
If a set of symptoms still persists, refer to Section 2 - Installation and ensure proper
installation and proper use of the controller in the system.
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