Rohde ST411 - Firing Program Errors

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Display screen
Icon
Description
Cause of error / Troubleshooting
Err.4
• Cooling error
• The kiln has been on zero
power for 30 minutes, but the
kiln temperature has not fallen
by at least 1°C.
• Contactor failure
(contacts possibly welded)
• Thermocouple disconnected or resistance too
high.
Err.5
Set kiln temperature exceeded.
The kiln temperature has exceeded the desired
temperature by a preset limit.
⇒ The contactor is not working
(contactor hanging).
⇒ Replace contactor
Err.6
The maximum duration of the firing
process exceeded.
The duration of the firing process exceeds a limit
value set in the factory.
⇒ Deactivated at the factory.
⇒ If you want to set a maximum firing time,
please contact ROHDE Service.
Err.7
The maximum room temperature
exceeded.
• The internal temperature of the controller has
exceeded a factory-set limit value.
• Factory set to 50°C.
• Possible causes:
- insufficient or incorrect ventilation of the
kiln
- operating location too small
- ventilation grille blocked
- exhaust air flap not closed
-
controller mounted too close to the kiln
Note:
• Each of the listed error messages leads to the termination of the firing process.
• Terminating the firing process protects the kiln from damage.
• The alarm buzzer will sound once per second.
• To reset the controller, turn off the power to the device and have the fault investigated and rectified by your installer or
kiln service engineer.
7.4. Firing program errors
Display screen
Icon
Description
Cause of error / Troubleshooting
Err.P
Program error:
• This error message is displayed if a
potential error is detected within the
firing program when the
j key is
pressed to start a firing.
• A buzzer sounds three times and
the segment number at which an
error may have occurred appears on
the segment display.
• Press the
g key and the error message
will be deleted.
• The controller now changes to
programming mode.
• The program in which the error may have
occurred can be called up and changed
if necessary.
• If no fault is found, then press the
j key
again to force the firing program to start.