Red Lion TSC - Manual (Page 79)

-77-
APPENDIX “C” - TROUBLESHOOTING (Cont’d)
PROBLEMS POSSIBLE CAUSE REMEDIES
“OPEN” IN DISPLAY 1. Probe disconnected. 1. Connect probe.
2. Input selector jumper in wrong position. 2. Verify correct jumper position.
3. Broken or burned out probe. 3. Replace probe.
4. Corroded or broken terminations. 4. Check connections.
5. Excessive process temperature. 5. Check process parameters.
“OLOL” IN DISPLAY 1. Temperature exceeds range of input probe. 1. Change to input sensor with a higher
temperature range.
2. Excessive positive probe temperature. 2. Reduce temperature.
3. Loss of set-up parameters. 3. Check set-up.
“ULUL” IN DISPLAY 1. Temperature below range of input probe. 1. Change to input sensor with lower bottom
range.
2. Excessive negative probe temperature. 2. Increase temperature.
3. Loss of set-up parameters. 3. Check set-up parameters.
“SHrt” IN DISPLAY 1. RTD probe shorted. 1. Check wiring.
2. Replace RTD probe.
DISPLAY INCORRECT 1. Incorrect probe. 1. Verify that input type selector and
OR DISPLAY WANDERS programming agree.
2. Connections reversed. 2. Check connections.
3. Loose or corroded connections. 3. Check connections.
4. Wrong thermocouple extension wire. 4. Check extension wire.
5. Failing or failed probe. 5. Check or replace probe.
6. Probe placed in unsuitable location or insulated from 6. Evaluate probe placement.
actual process temperature. a. Increase digital input filtering.
7. Controller needs calibration. 7. Check calibration.
(see Appendix “E” Calibration Accuracy)