Sterling SDF 250 User Manual
Page 36
SDF 250/400/500
Error and error correction 4-6
Overload Regeneration Heater - STB has been activated
Check the safety temperature limiter (= STB).
Check regeneration heater.
Short circuit check.
Overload Drying Heater - STB has been activated
Check the safety temperature limiter (= STB).
Check drying heater.
Short circuit check.
Main switch hopper heater # - Controller is off
Switch on the main switch of the hopper heater.