HMS 0700-7000-0002-0001: failed to pull filament out of the extruder
Unloading failed. The filament is gripped by something — a clog, a cold hotend, or a mushroomed tip.
Category: Error codes
Machine error codes explained: Bambu HMS codes, MINTEMP and MAXTEMP, thermal runaway, homing and probe failures. What the code means, and what to check first.
HMS 0500-0300-0001-0001: MC module malfunctioning
The motion control board stopped answering. Restart first, then look at the cable that carries the link.
HMS 0C00-0100-0002-0008: Live View camera image failed
The camera stopped delivering frames, so spaghetti detection is off. Printing continues, but unmonitored.
HMS 0700-2000-0002-0004: filament broken in the toolhead
A piece of filament snapped off and stayed behind. It has to come out before anything else will load.
HMS 0700-4000-0002-0001: AMS filament buffer signal lost
The buffer that keeps filament tension no longer reports its position. Cable, sensor, or a spring stuck at one end.
HMS 0300-0D00-0002-0001: heatbed homing abnormal
The bed probe got an inconsistent reading. A dirty nozzle tip is the cause far more often than a warped plate.
HMS 0300-3100-0001-0001: part cooling fan too slow or stopped
The part fan is not spinning at the commanded speed. Debris in the blades and packed dust are the usual reasons.
HMS 0300-2000-0001-0001: X-axis homing abnormal
The toolhead did not reach the home position when told to. Something is in its way or the rail has gone stiff.
HMS 0300-0100-0001-0007: heatbed sensor open circuit
The bed thermistor is reading as disconnected. Nearly always the connector, occasionally the cable, rarely the sensor.
HMS 0300-0200-0001-0003: nozzle heater over temperature
The hotend went past its safe ceiling. Treat this as a real fault, not a nuisance warning.