13
error on sensor input
The control channel shuts down because of an error
on the sensor input (e.g. overflow). Error is latched
until next firing is started. Possible causes:
• thermocouple or compensating wire interrupted
• maximum temperature has been exceeded
• thermocouple polarized wrong (temperature reading
„under“)
policeman activated
When exceeding the maximum programme tempera-
ture by 20°C or more the integrated policeman shuts
down the kiln using the safety contactor (applies only
if your kiln is fitted with a safety contactor). This
prevents your kiln from overfiring in case the main
contactor stucks in the ON position for instance.
Possible causes for over temperature:
• kiln contactor stuck in ON position
• a contact of the contactor has melted together
Certain errors (like power breakdown, break of sensor,
kiln problem etc.) found by the controller are
processed accordingly. Important errors are show
immediately on display (12) by a unique code number
(see example on the left hand side showing code
„A4“). All error messages are recorded by the
controller for post analyzation (see appendix B).
The error codes are divided into operation or control
problems (codes A ..), power breakdown (code B ..),
internal problems (code C ..) and hardware problems
(code D ..).
Following is a complete listing and explanation of all
possible error messages:
Z3
Z 1
Z2
Error A1
Error A3
Appendix A
Error Messages
of the TC505
