Rohde TC 304 Guide D'installation, De Programmation Et D'utilisation page 19

Appendix A : TC304 Error and Event messages
Error and event archive
Special events (power failure, broken sensor, kiln problems, etc .) are detected by the
control unit and treated accordingly .
The event codes are classified as follows:
E-CODE A = operating and controller problems
E-CODE B = power failure problems
E-CODE C = internal problems
E-CODE D = hardware problems
The possible event messages and their meanings are listed and explained below .
E A 1
Event
Error at signal input
Control switched off due to error at signal input (e .g . exceeding measure range) .
The error will be reset after restarting the program . Possible causes:
• Thermocouple or supply interrupted
• Maximal temperature of controller exceeded
• Thermocouple connected to wrong poles (Temperature display „UNDER")
E A3
Event
Safety circuit activated
If the maximum program temperature is exceeded by more than 20°C the safety cir-
cuit is activated and the safety power relay switches the kiln off (only if installed and
configurated) .
This prevents the kiln from overheating .
Possible causes for overheating:
• Kiln power relay stuck in „ON" position
• Contact of kiln power relay closed permanently
E A4
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