I have a Paragon Caldera with the Sentry Xpress controller. I put the kiln on last night on a cone 6 program with a "slow" speed. When I checked this morning I had an FTL error message and it was held at 922 degrees centigrade (1691F). I restarted the program with a "fast" speed and it's currently up to 1039c (1902f) and seems fine. Is there a reason why it would not be able to gain temp on the slow setting? The kiln is about 18 months old, I replaced the thermocouple about 4 months ago. I've been told it could be the relay or the elements need replacing, how would I know which? Any advice would be appreciated. Thanks.
You're right--a kiln with worn elements should have an easier time maintaining a slow firing than a fast firing. Perhaps the FTL appeared because the voltage was low during that particular firing. It is not unusual for the line voltage that is coming into your building to fluctuate.
Should you need to replace the elements, please use the newest element replacement instructions. We just recently revised the manual:
Let me know if you have questions. I have included my email address below.
Paragon Industries, L.P., Mesquite, Texas USA
email@example.com / www.paragonweb.com