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8. What if …
Error No. Description Instructions for users
Operating errors
* Err 1 T-value entered is lower than the current temperature Allow the furnace to cool to a lower temperature, or enter
(temperature in the furnace chamber). a higher temperature value.
Err 2 T-value entered is lower than the B-value or higher than Set a logical temperature value.
1200 °C (2192 °F).
Err 3 S-value entered invalid (observe Firing Table) Set an acceptable closing time.
Err 4 H-value entered is invalid (observe Firing Table) Set an acceptable holding time.
Err 5 t➚-value entered is below 30 °C/min (54 °F/min.) Set an acceptable temperature increase value.
or higher than 140 °C/min. (252 °F).
Err 6 B-value entered is lower than 100 °C (212 °F) or higher than Set an acceptable stand-by temperature.
700 °C (1292 °F).
Err 7 B-value entered is higher than the T-value. Set an acceptable stand-by temperature.
Err 8 L-value entered is higher than the T-value. Set an acceptable value for the long-term cooling.
Err 9 V1-value entered is higher than the V
2
-value. Set a suitable V
1
- or V
2
-value.
Err 10 V-values entered are higher than the T-value. Check the set temperature. Adjust the values for
V
1
and V
2
, if necessary.
Err 11 V
1
- or V
2
-value(s) missing. Set the missing value.
Err 12 V-value entered is higher than 1200 °C (2192 °F). Set a lower value.
*Err 13
1)
Temperature is too high (actual temperature is +12 °C (21.6 °F) Take care when editing the parameters during a program in
higher than the T-value). progress. If necessary, allow the furnace to cool to the set
temperature and try again. Should this not help, there is probably
a malfunction in the electronic controls.
*Err 14 Temperature in the firing chamber is too high for the ‘Silver Test’ The furnace cools down and the program then starts automatically.
(above 400 °C (770 °F).
Err 15 L-value entered is higher than 1200 °C (2192 °F) or lower than Set a lower value for the long-term cooling.
50 °C (122 °F).
Err 16 Firing temperature 1 > firing temperature 2 Set a lower value for firing temperature 1 or a higher value for
firing temperature 2.
Err 17
1)
Power failure lasting more than 10 s during a program in progress. A program in progress has been interrupted by a power failure.
Err 18 Firing temperature 1 > vacuum values for the 2nd firing stage. Set a lower value for firing temperature 1 or a higher value for the
vacuum of the 2nd firing stage.
Err 19 The pre-vacuum function was selected, but the V2 value is missing or invalid. V
2
value must be higher than B.
Furnace errors
*Err 20 Error in the heating system. Low voltage; high temperature increase rate. Check the fuse (24) in the supply unit. If this error message
appears, the heater is switched off for safety reasons. The furnace
head (1) opens and the keypad does not work. This error cannot
be acknowledged with STOP. The furnace has to be switched off
and switched on again.
Err 22 Closed furnace head is not acknowledged. A foreign object between the furnace head (1) and the furnace
base may obstruct the closing of the furnace head. See the end of
the error list for further explanations regarding this error.
Err 23 Muffle is ageing. The muffle is worn down. It is recommended to have is replaced.
After having acknowledged the error message, however, the
program can be started.
Err 24 Muffle is defective. The muffle must be replaced immediately.
Err 25 Temperature is the furnace base is higher than 65 °C (149 °F). Bring the temperature in the furnace base to value lower than
65 °C (149 °F). Make sure that the air vents are clean and free
from obstruction.
8.1 Error messages
List of possible Error messages and their meaning
Operating errors
Error messages have to be acknowledged with STOP (60). Impossible values are not accepted. The value
is deleted when ENTER is pressed and the ‘old’ value reappears. Parameters outside the acceptable value
range are not accepted. Illogical values result in an error message being displayed.
This chapter will help you to
recognize malfunctions and
take appropriate measures or,
if possible and acceptable, to
perform some simple repairs.
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