¶ E301 - L-Nozzle temperature is too high
¶ The temperature of left hot end recognized by system is over the up limitation.
¶ Steps:
(1) Turn off machine, unplug the main power cable. Unplug the cable on the top of left extruder, toggle the buckle of extruder and take it off.
(2) Use 2.0 mm hex screwdriver to remove the 4 screws fixing the black cover of left extruder. (Figure - 1)
(3) Re-plug the plug of nozzle temp sensor in the interconnection board (red highlighted in figure - 2), and install left extruder assembly back. Use the knob wrench to to remove the back cover of printer, locate the J10 in main board and re-plug it (highlighted in figure - 3). Then, power printer on and do a test printing.
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If the issue presist:
(4) Check if the left temperature sensor or its cable was broken. Refer to step 1 & 2 to take the left extruder assembly off, unplug the plug of nozzle temp sensor (Figure - 2), and use the meter to measure the resistance of the sensor via the 2 pins of plug (it should be around 110Ω@25℃). If the resistance value had a big difference, please replace the temp sensor. (step of replacement)
If the issue presist:
(5) Check if the cables in left umbilical track had any damages, replace the assembly as needed (umbilical track and cables).
(6) If the left heating cartridge starts heating hot-end right away after printer was powered on and can’t be stopped even target or limitation is reached, this means the main board is losing control on left heating cartridge. Replaced the mainboard (Step of replacement).