Page
ST312
User
Handbook
16
Error Messages
Err
o
r Messages
Error 1. The kiln temperature is not
increasing as required. The kiln has been
on full power for 1 hour but the kiln
temperature has not risen by at least 8°C.
Error 2. Thermocouple or thermocouple
wiring open circuit. Get thermocouple
and wiring checked. Have thermocouple
replaced if necessary.
Error 3. Thermocouple reversed (kiln
temperature apparently less than –40°C).
This is an installation fault. Get wiring
checked.
Error 4. Kiln temperature too high. The
kiln has been on zero power for 30
minutes but the kiln temperature has not
fallen by at least 1°C
Err1
°C
°C/hr
hr.min
Err2
°C
°C/hr
hr.min
Err3
°C
°C/hr
hr.min
Err4
°C
°C/hr
hr.min
Possible causes are: kiln door or lid not closed properly, heater element failure,
elements too old, power phase failure, contactor failure or thermocouple short-
circuit.
Error 5. Kiln temperature overshoot. The
kiln temperature exceeds the desired
temperature by at least 10°C / 20°C
(installer selectable).
Err5
°C
°C/hr
hr.min
Error 6. Maximum firing time exceeded.
The length of the current firing has
exceeded an installer selectable (10—999
hours) limit.
Err6
°C
°C/hr
hr.min
Possible causes are: contactor failure or thermocouple connection intermittent
or high resistance.
ST312 User Handbook
Page 5
Turning On
F1
.
04
tC
.
r
tC
.
S
tC
.
n
tC
.
K
8
.
8
.
8
.
8
.
When turned on the ST312 performs a
display test by briefly illuminating all of
the display digits and all of the front
panel lamps.
The version number of the software embedded
within the ST312 is now displayed. If you ever
need technical support you will be asked for this
code together with the ST312’s serial number.
Next displayed is the thermocouple type to which the ST312 is set. This
thermocouple type setting should match the type of thermocouple fitted to
the kiln and can be R, S, K or N type.
‘R’ type
thermo-
couple
‘S’ type
thermo-
couple
‘K’ type
thermo-
couple
‘N’ type
thermo-
couple
20
°C
°C/hr
hr.min
.
20
°C
°C/hr
hr.min
20
.
°C
°C/hr
hr.min
The final display should show the
kiln temperature (20°C shown here)
with the ‘°C’ indicator on. All
other lamps should be off.
If the left-hand decimal point is on
then the keyboard is locked. This is
an anti-tamper feature. Press the
©
&
ª
keys together & hold down for
5 seconds to unlock.
If any mimic panel lamps are on then
the ST312 is firing. Press the
START/STOP key to stop the firing.
During firing the right-hand decimal
point will light to show when the kiln
is heating.
T
u
rning On
