Touchscreen Warning Messages

Owned by Riley gunn
Last updated: Sept 18, 2024
6 min read

Use this guide to determine what may be the cause of warning messages.

Thermocouple Reader Fault

This fault may occur for either the “EBBCan” MCU or the “mcu” MCU. The “EEBCan” MCU relates to the printhead, while the “mcu” MCU relates to the chassis and bed.

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EBBCan Thermocouple Reader Fault

There is only one temperature sensor on the printhead that could issue this warning and that is the thermistor for the extruder. Things to check are:

  • Unplugged Thermistor

  • Broken Thermistor Wires

  • Fraying Thermistor Wires

  • Excessive Material Build-up near Thermistor Wires

If none of these checks reveal an obvious answer then the last check to determine the fault is measuring the nominal resistance of the thermistor at room temperature. The thermistor used for the extruder on the HS3 is a PT1000 type RTD. At room temperature it should be approximately 1000Ω. Use a multi-meter to measure the resistance.

  • If the PT1000 measures out as an open-circuit, then the thermistor is damaged and will need to be replaced. Contact Pantheon for a replacement.

  • If the PT1000 measures out as a short-circuit, then the thermistor is damaged and will need to be replaced. Contact Pantheon for a replacement.

  • If the PT1000 measures out around 1000Ω (800Ω - 1200Ω), then contact Pantheon for further testing. It may be required to send the printhead to Pantheon for refurbishment.

MCU Thermocouple Reader Fault

If there is an MCU thermocouple reader fault it may be relating to one of three temperature sensors, Bed, Chassis, Chamber, that the primary MCU monitors. The most likely culprit would be the Bed so it is advised to start the investigation there.

Bed Thermistor

The bed thermistor is a 100kΩ NTC embedded in the silicon heating element under the bed. Things to check are:

  • Unplugged Thermistor Cable

  • Broken Thermistor Cable

The bed thermistor is not a serviceable item, contact Pantheon if you suspect a serious fault has occurred.

Chassis Thermistor

The chassis thermistor is a PT1000 RTD located next to the z-stepper motor on the left side of the machine. Things to check are:

  • Unplugged Thermistor Cable

  • Broken Thermistor Cable

The chassis thermistor is a serviceable item, contact Pantheon if you suspect a serious fault has occurred for a replacement.

Chamber Thermistor

The chamber thermistor is a PT1000 RTD located in the air-duct through the top-plate on the right side of the machine. Things to check are:

  • Unplugged Thermistor Cable

  • Broken Thermistor Cable

The chamber thermistor is a serviceable item, contact Pantheon if you suspect a serious fault has occurred for a replacement.

Heater not Heating at Expected Rate

There are several heating elements on the HS3 that this warning message can relate to. The warning message will mention which heater it relates to. In the picture below, the “extruder” is not heating at expected rate.

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Extruder not Heating at Expected Rate

This warning is issued as a fail-safe when the extruder is not heating up as fast as it is expecting based on the PID tune. However this warning can be issued for multiple genuine errors relating to extruder.

Extruder Heater Element Failure

The extruder contains two 50W heater elements that work together to maintain print temperatures. If one or both of these heater elements are not functioning correctly, the warning will be issued. Things to check are:

  • Both heaters are plugged in correctly

  • No broken or fraying wires

  • No excessive build-up of material near the heater wires

If none of these checks reveal an obvious answer then the last check to determine the fault is measuring the nominal resistance of the heater element at room temperature. At room temperature each heater element should be approximately 13Ω. Use a multi-meter to measure the resistance.

If the heater measures out as an open-circuit, then the element is damaged and will need to be replaced. Contact Pantheon for a replacement.

If the heater measures out as a short-circuit, then the element is damaged and will need to be replaced. Contact Pantheon for a replacement.

If the heater measures out around 13Ω, then contact Pantheon for further testing. It may be required to send the printhead to Pantheon for refurbishment.

Excessive Build-Up of Material on the Printhead

In rare cases, excessive build-up of material on the extruder can result in this warning being issued. This occurs when the extruder is attempting to heat up but the effective mass of the extruder is now outside the expected PID tune. A considerable amount of material on the extruder is needed to cause this condition, however it can happen when a part detaches from the bed and sticks to the extruder.

Abnormal Part Cooling

In rare cases, automatically generated excessive part cooling from the slicer with a change in requested print temperature may cause the extruder to not heat up at the expected rate. This phenomenon has only been observed a few times and is highly unlikely to be the cause of the warning.

Bed not Heating at Expected Rate

This warning is issued as a fail-safe when the bed is not heating up as fast as it is expecting based on the PID tune. However this warning can be issued for multiple genuine errors relating to bed’s heating element.

Bed Heater Element Failure

The bed has a 500W resistive heating element adhered to the underside of the cast aluminum plate. Things to check are:

  • Power and Thermistor cables are plugged in correctly

  • The silicon pad is not drooping or detaching from the aluminum plate

  • The color of the silicon pad is consistent over the entire surface (no regions of over-heating or burn marks)

When measured with a multimeter set to resistance, it should measure out to approximately 1Ω.

The bed heater is not a serviceable item. Contact Pantheon if you suspect a serious fault has occurred.

ADC out of Range

This fault may occur for either the “EBBCan” MCU or the “mcu” MCU. The “EEBCan” MCU relates to the printhead, while the “mcu” MCU relates to the chassis and bed. ADC out of range typically indicates that one of the temperature sensors has breached its expected operating range.

EBBCan ADC out of Range

This is warning is issued when the extruder temperature is outside the normal operating range. This can be associated with the following:

Faulty Extruder Thermistor

“EBBCan” ADC out of Range is typically associated with a thermistor failure which reports a value well outside of normal operating conditions. Inspect the thermistor for damage.

Requested Extruder Temperature too near the Limit

Requesting a temperature that is too close to the temperature limit of the extruder may cause this warning to occur. For example, if the limit is 330C and the requested temperature is 330C, then when the extruder heats up and tries to maintain 330C, it may reach 330.5C and throw this warning.

MCU ADC out of Range

This is warning is issued if a temperature sensor on the machine’s chassis or bed is outside the normal operating range. This can be associated with the following:

Faulty Bed Thermistor

“MCU” ADC out of Range is typically associated with a thermistor failure which reports a value well outside of normal operating conditions. Inspect the bed thermistor for damage.

Faulty Chassis Thermistor

Inspect the chassis thermistor for damage.

Faulty Chamber Thermistor

Inspect the chamber thermistor for damage.

Requested Bed Temperature too near the Limit

Requesting a temperature that is too close to the temperature limit of the bed may cause this warning to occur. For example, if the limit is 130C and the requested temperature is 130C, then when the extruder heats up and tries to maintain 130C, it may reach 130.5C and throw this warning.

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