Issue: On my tower dryer, I sometimes get a dryer shutdown and a high or low temperature alarm is present on the HMI screen and on the temperature controller. I can clear the alarm and verify the plenum temperature is normal and then immediately restart the dryer.
- Check connections to the RTD.
- Faulty RTD. It is very rare, but an RTD can spike for a fraction of a second, causing an alarm condition on the temperature controller, even though plenum temperature is normal, which will cause a dryer shutdown.