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Eurotherm 2404 not sending output power after turning adaptive tuning on

Hello,

I recently turned on adaptive tuning on our 2404 controller to try and limit oscillations. I did a test run and the furnace got up to temperature and came down with no problem. It's about a week later now and we are trying to do another run but have found that the controller is no longer sending output power to the furnace. The set point will increase but the process temperature does not move. Output power is steady at 0.5/100 and ammeter shows no current flowing to the heating elements. Set point will climb to over 200C and the process temperature does not change. Any ideas on what could be going wrong?

Thanks for your help!
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