¶ E301 - L-Nozzle temperature is too high
¶ The temperature of left hot end recognized by system is over the up limitation.
¶ Steps:
1. Re-plug the cable connector on the top of L-extruder, and try again.
2. Check the cable connection of temp sensor - L nozzle. (When the temperature sensor cable connection has an open circuit, the screen will display a maximum temperature of 1100°C)
- Power printer off, unplug main power cable. Toggle the buckle of extruder, remove the cable plug on the top and take it off.
- 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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3. If the issue persist, measure the resistance of temp sensor - L nozzle.
- Repeat step to take L extruder assembly off, unplug the cable connector of temp sensor (figure - 2). Use the meter to measure the resistance of the sensor via the 2 pins of plug, it should be around 110Ω@25℃ (Reference: 190Ω@240℃). The higher the resistance is, the higher temp value would be displayed in screen. Please replace the temp sensor as needed. (step of replacement)
4. If the issue persist, check if the cables in left umbilical track had any damages, replace the assembly as needed (umbilical track and cables)
If the resistance was confirmed to be fine via step 2, then you can determine whether the cable in umbilical track was damaged by measure the resistance between pin 10 and pin 12 on J10 connector (110Ω@25℃). If no resistance can be measured, or if the resistance is extremely high, please check if the cables in left umbilical track had any damages, eplace the assembly as needed
5. Replaced the mainboard (Step of replacement).