Skutt FireBox8x6 LT - Manual (Page 20)

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Error Codes
Error Codes are your kilns way of telling you that something is wrong. Below is a list of error codes along
with their description and potential fixes. Unlike refrigerators, you will not find a kiln in every house, therefore
it may be harder to find and schedule a repair. That is why our technicians here at Skutt have become very
good at walking people through simple repairs over the phone. Parts can be shipped the same day so you
can be up and going in no time at all.
Thermocouples and elements are the most common maintenance items that will need to be replaced. Like
brakes in your car they will eventually need to be replaced. The most common error messages you find below
can quickly be resolved by learning to replace these two items. You can find videos on how to do these re-
pairs at www.skutt.com.
tC FAIL - tC alternating with FAIL indicates the thermocouple has failed. Replace the defective thermocouple.
To clear the error, press any key.
PF - Is displayed whenever there is a power interruption that causes the kiln to drop below 140 °F (60 °C) or
before the kiln reaches 140 °F (60 °C). Press ENTER to clear the error. If you know the reason for the power
failure was not related to the kiln just restart your program. If there is a temporary power interruption that does
not cause the kiln to fall below 140 °F (60 °C), the kiln will continue to fire the program entered.
tC- - Is displayed when the red and yellow thermocouple wires are reversed. This usually occurs when the ther-
mocouple is installed backwards but can also occur if the red and yellow wires are reversed at any point in the
thermocouple circuit.
Err1 - Is displayed when the kiln is unable to achieve a rise in temperature of at least 12 °F/Hr (7 °C/Hr). This
can be triggered by many different things. The most common are aging elements, intermittent or faulty relays,
and low voltage.
Errh - This message indicates a problem with the hardware on the controller itself. This is pretty rare. We suggest
you call a Skutt technician to resolve this problem.
Errf - This error is triggered by the kiln not decreasing in temperature at the rate programmed. This message
only occurs during a segment when the kiln is programmed to be decreasing in temperature at a controlled rate.
It is usually caused by a Solid State relay failing in the closed position (on). The FireBox Lt kilns have a built-in
safety relay to prevent your kiln from overheating if your relay fails closed. If you received this message it is
most likely that your Solid State relay needs to be replaced.
Errd - This error is triggered by the kiln rising in temperature at a faster rate than the kiln is programmed. this
message only occurs during a segment when the kiln is programmed to be increasing in temperature. It is usually
caused by a Solid State relay failing in the closed position (on). The FireBox Lt kilns have a built-in safety relay
to prevent your kiln from overheating if your relay fails closed. If you received this message it is most likely that
your Solid State relay needs to be replaced.
Errr - This one is very rare. Call a Skutt technician for more information.
Stuc - This error is triggered when a key is held depressed for too long and usually indicates the key is stuck.
Sometimes this is a temporary situation but sometimes it may require a new controller.
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