Error list

This kind of errors can appear if something wrong happens:

#1 If the thermistor doesn't detect temperature, the main board would not control properly the heating:

Messages:

Error(81): Left thermistor not detected"

Error(82): Right thermistor not detected"

Error(83): Bed thermistor not detected"

#2 Thermal Runaway Protection

This is feature protects your printer against a thermistor malfunction that could cause damage on the printer.

The issue itself: If a thermistor come off, it will read a lower temperature than actual. The system will turn the heater on forever, burning up the filament and anything else around.

After the temperature reaches the target for the first time, this feature will start measuring for how long the current temperature stays below the target minus _HYSTERESIS (set_temperature - THERMAL_RUNAWAY_PROTECTION_HYSTERESIS).

If it stays longer than _PERIOD, it means the thermistor temperature cannot catch up with the target, so something may be wrong. Then, to be on the safe side, the system will he halt.

Bear in mind the count down will just start AFTER the first time the thermistor temperature is over the target, so you will have no problem if your extruder heater takes 2 minutes to hit the target on heating.

Message:

ERROR(88): Temperature not reached by heater id: Heater_ID[1].

#3 Heating sanity check

This waits for a watch period in milliseconds when the target temperature is increased. If the temperature has not increased at the end of that period, the target temperature is set to zero.

Messages:

ERROR(89): Hotend Heater_ID[1] is not heating

ERROR(89): BED is not heating

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[1]Heater_ID possible values:

• 0 : Left hotend
• 1 : Right hotend
• 9 : Heated Bed