29
ENGLISH
Appendix A: TC 504 Error and event messages
Error and event messages
The controller indicates particular events such as short circuits, sensor malfunctions,
kiln errors, and processes them accordingly .
The event codes are:
E-CODE A = operational and controller errors
E-CODE B = errors resulting from power outage
E-CODE C = internal errors
E-CODE D = hardware errors
The list below shows possible event messages and their significance .
Event
E A 1
Error on sensor input
An error on the sensor input causes the controller to switch off (e .g . overflow in
measuring range) . The error will only be reset when a program is restarted .
Possible causes:
• Thermocouple or compensating wire interrupted
• Maximum temperature has been exceeded
• Thermocouple polarized incorrectly (temperature display “
UNDER
“)
Event
E A3
Safety circuit operational
When the maximum program temperature is exceeded by more than 20°C, the
safety circuit is operational and the safety contactor switches the kiln off (only if your
kiln is equipped with a safety contactor) . This prevents your kiln from overfiring .
Possible causes for over temperature:
• Kiln safety contactor stuck in “ON“ position
• Contactor is permanently operational
E A4
