¶ Issue Description
The touch screen or Fluidd displays an error message:
Error loading template virtual_sdcardon_error_gcode
¶ Reasons
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Firmware settings are incorrectly modified.
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The motherboard cooling fan or the motherboard is damaged.
¶ Troubleshooting Steps
¶ Tools needed for toubleshooting
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An USB flash drive (FAT-32 format with a capacity of less than 16 GB)
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A TF card (FAT32 with a block size of 4096 bytes and a capacity of less than 32 GB)
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A 2.0 mm Allen key
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A Phillips screwdriver
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A multimeter
¶ Step 1 Load the fix pack and update the motherboard and touch screen firmware
Note: If the motherboard and touchscreen firmware have never been modified, refer to Step 2 for further troubleshooting.
How to load the fix pack and update the motherboard firmware and the
touch screen firmware for Neptune 4 Plus and Neptune 4 Max：
How to use the motherboard firmware and touch screen firmware
How to load the fix pack and update the motherboard firmware and the
touch screen firmware for Neptune 4 and Neptune 4 Pro:
How to update the motherboard firmware and the touch screen firmware
¶ Step 2 Check whether the motherboard cooling fan can rotate normally
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On the touch screen, Select Control - Nozzle and set the nozzle temperature to 200°C.
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Check whether the motherboard cooling fan can work normally once the nozzle temperature reaches 50°C.
Note: The firmware is configured to automatically activate the motherboard cooling fan and heat break cooling fan once the nozzle temperature reaches 50°C.
Motherboard position for Neptune 4 and Neptune 4 Pro:
Motherboard position for Neptune 4 Plus and Neptune 4 Max:
¶ Step 3 If the motherboard cooling fan cannot rotate, check whether its plug is loose
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Turn the power switch OFF (symbol "〇") and unplug the power supply cable.
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Release and remove the ten screws securing the bottom cover with a 2.0 mm Allen key and Phillips screwdriver.
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Re-plug the motherboard cooling fan plug and the adapter wire.
How to remove the bottom cover and find the motherboard cooling fan plug for Neptune 4 and Neptune 4 Pro:
How to remove the bottom cover and find the motherboard cooling fan plug for Neptune 4 Plus and Neptune 4 Max:
If the issue still occurs, refer to Step 4 for further troubleshooting.
¶ Step 4 If the motherboard cooling fan still cannot rotate, check whether its port has 24 V DC voltage
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Plug in the power supply cable and turn the power switch ON (symbol "|").
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On the touch screen, select Control - Nozzle and set the nozzle temperature to 200 ℃.
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Test whether the motherboard cooling fan port has a voltage of 24 V DC with a multimeter.
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If there is no voltage at the port, or if the voltage deviation is significant, it is necessary to replace the motherboard.
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If there is voltage at the port, it is necessary to replace the motherboard cooling fan.
If the motherboard cooling fan still cannot rotate, refer to Step 5 for further troubleshooting.
¶ Step 5 Check that the heat break cooling fan can rotate normally
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The motherboard fan and heat break fan are connected in parallel. If a multimeter is unavailable, set the nozzle temperature to 200°C.
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Check whether the heat break fan starts rotating normally once the nozzle temperature reaches 50°C.
Note: Remove the two screws securing the extruder housing and you can inspect the heat break cooling fan.
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If the heat break fan cannot rotate, it is necessary to replace the motherboard.
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If the heat break fan rotates normally, it is necessary to replace the motherboard cooling fan.
