firmware/docs/notes/70-error-codes.md

Error code table (English strings, complete)

Useful as a behavioral spec — every hardware fault the stock system distinguishes.

Toolchanger

• E0127–E0130: T1–T4 not in dock. Cannot pick up extruder.
• E0051–E0054: T1–T4 pickup failed.
• E0131–E0134: T1–T4 already in dock. Cannot release extruder.
• E0135–E0138: T1–T4 release failed.
• E0139: Extruder mount sensor not triggered
• E0140: Extruder dock sensor not triggered
• E0141: Extruder mount sensor still triggered
• E0142: Extruder dock sensor still triggered
• E0143: State error after extruder pickup
• E0144: State error after extruder release
• E0145: Lock motor current abnormal
• E0146: Unlock sensor not triggered.
• E0160: Cannot release extruder. Homing failed.
• E0165: extruder not installed, can not print.

Leveling / probe (eddy)

• E0041: Leveling sensor cannot reset.
• E0147: Build plate not removed. Please check.
• E0148: The leveling extreme values are out of range. Please clean the platform or adjust its flatness, then try again.
• E0149: Sensor not triggered at max travel.
• E0150: Homing timeout.
• E0151: Eddy current probe triggered before move.
• E0152: During leveling, the values measured multiple times are out of range. Please clean the platform and nozzle, then try again.
• E0153: During nozzle offset calibration, the values measured multiple times are out of range. Please clean the eddy-current sensor and nozzle, then try again.
• E0161: Bed eddy current position abnormal. Please check.
• E0167/E0168: The platform is not installed. Please install it and try again.

Heating

• E0063–E0066: Extruder 1–4 heating error.
• E0123: Bed heating error.
• E0077: Chamber heating error.
• E0154: Drive motor temp abnormal. Please check if PCB fan is on.

Axes / homing

• E0012/E0013/E0014: X/Y/Z-axis signal not triggered.
• E0155/E0156/E0157: X/Y/Z-axis limit still triggered after retract.
• E0158: Sensor error. E0159: Homing error.

Communication

• E0002: MCU communication lost.
• E0124: Extruder mount MCU communication lost. (eboard)
• E0125: Heater board MCU communication lost. (eheaterboard)
• E0126: Leveling board MCU communication lost. (levelboard)
• E0170–E0173: Lost communication with main/extruder/heater/level mcu
• E0005: Printer is not ready. Please check if the wiring is correct.

Print-time

• E0162: Paused. Filament runout.
• E0163: Paused. Clog detected.
• E0164: Paused. Spaghetti detected. (camera AI)
• E0166: Print file error. E0169: Printer model mismatch. Please re-slice.
• E0175: Internal error on command. E0176: The gcode move out of range.
• E0021: Cannot open camera. / Camera not recognized.
• E0174: Copy log error. E0999: Unknown error.