Red Lion TSC - Manual (Page 80)

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APPENDIX “C” - TROUBLESHOOTING (Cont’d)
PROBLEMS POSSIBLE CAUSE REMEDIES
TEMPERATURE NOT 1. Incorrect PID values. 1. See PID CONTROL.
STABLE OR SLUGGISH 2. Heater undersized. 2. Increase heating power.
3. Improper probe location. 3. Evaluate probe location.
OUTPUTS NOT WORKING 1. Improperly wired. 1. Check wiring.
2. Incorrect output module. 2. Check output module.
3. Defective output module. 3. Check or replace output module.
LINEAR DC OUTPUT 1. Too high load resistance. 1. Check that maximum load resistance is
NOT WORKING < 500 W (10 V).
2. Incorrect programming or scaling. 2. Check programming.
3. Connections reversed. 3. Check connections.
4. DC voltage source in loop. 4. This is an active loop. Remove all DC
voltage sources.
CONTROLLER LOCKS UP 1. Noise spikes entering controller due to load 1. a. Use Triac output module, if possible.
OR RESETS switching transients. b. Use RC snubbers or similar noise suppressors
at load point. (Do NOT use at the controller.)
c. Use separate AC feed line to controller.
d. Locate controller & signal lines away from
noise producing mechanisms (solenoids,
transformers, relays, etc.).
e. See “Installation Considerations Of
Electronic Instruments Controls In Industrial
Environments” in RLC catalog.
2. Defective controller. 2. Replace unit.