HMS 0300-0600-0001-0002: Motor-A short circuit
Affected machines: A2L, P2S, X1 series. Swapping the two motor connectors at the board is the decisive test: whichever way the fault…
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 0300-0600-0001-0003: Motor-A resistance abnormal
Affected machines: A1, A2L, P2S, X1 series. Two of the three causes are in the wiring rather than the motor. Measuring while…
HMS 0300-0400-0002-0001: part cooling fan too slow or stopped
Affected machines: A2L, H2, X1 series. The part cooling fan is usually a blower rather than an axial fan, because it has…
HMS 0300-0300-0002-0002: hotend cooling fan running slowly
Affected machines: H2S, P2S, X1 series. This is the same fan as the stopped-fan code, caught earlier. The machine measures fan speed…
HMS 0300-0200-0001-0009: right nozzle temperature control fault, or no hotend fitted
Affected machines: A1 Mini, A2L, H2, P2S, X2D. This code differs from the other temperature faults in one important way: it is…
HMS 0300-0200-0001-0006: right extruder nozzle temperature sensor short circuit
Affected machines: A2L, H2, H2S, P2S, X1 series. On a dual-nozzle machine the code names which side is reporting, and that matters:…
HMS 0300-9300-0001-0006: chamber temperature sensor fault
The chamber temperature reading has become implausible. It affects heated chamber control, not the hotend or the bed.
HMS 0300-0100-0001-0008: heatbed heats too slowly
The bed is heating, but not at the rate the printer expects. Usually ambient conditions or a draught rather than a failed heater.
HMS 0300-1000-0002-0001: X axis resonance frequency low
The measured resonance of the X axis has dropped below the expected band. Nearly always belt tension.
HMS 0300-0600-0001-0001: motor A open circuit
One of the two CoreXY motors reads as disconnected. On a CoreXY machine, losing one motor breaks both axes at once.