Download Red lion TSC Temperature Setpoint Controller Manual

APPENDIX “C” - TROUBLESHOOTING (Cont’d)
PROBLEMS
POSSIBLE CAUSE
REMEDIES
TEMPERATURE NOT
STABLE OR SLUGGISH
1. Incorrect PID values.
2. Heater undersized.
3. Improper probe location.
1. See PID CONTROL.
2. Increase heating power.
3. Evaluate probe location.
OUTPUTS NOT WORKING
1. Improperly wired.
2. Incorrect output module.
3. Defective output module.
1. Check wiring.
2. Check output module.
3. Check or replace output module.
LINEAR DC OUTPUT
NOT WORKING
1. Too high load resistance.
1. Check that maximum load resistance is
< 500 W (10 V).
2. Check programming.
3. Check connections.
4. This is an active loop. Remove all DC
voltage sources.
CONTROLLER LOCKS UP
OR RESETS
2. Incorrect programming or scaling.
3. Connections reversed.
4. DC voltage source in loop.
1. Noise spikes entering controller due to load
switching transients.
2. Defective controller.
-78-
1. a. Use Triac output module, if possible.
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. Replace unit.