Prusa CORE One L

Troubleshooting

Stringing and oozing

Stringing or oozing, also known as "hairy prints", is the name given for when small strings of filament are left on a printed model. This usually happens when the filament keeps…

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The Benchy hull line

The 3DBenchy is a 3D model designed by CreativeTools specifically for testing and benchmarking 3D printers. And everyone wants to know, how to print a perfect Benchy. Ever since…

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Layer shifting

Layer shifting is a printing issue that causes the layers of the printed object to shift from their intended positions. It is usually associated with an abnormal movement of the…

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Warping

Poor bridging

Layer separation and splitting FDM

Bad looking surface above supports

Watertight prints

Ghosting

Nextruder filament sensor (CORE One, CORE One L, MK4/S, MK3.9/S, XL/+)

Stuck filament detection #31101 (CORE One) #35101 (CORE One L) #26101 (MK4S) #13101 (MK4) #27101 (MK3.9S) #21101 (MK3.9) #17108 (XL)

Failing supports

Connect Registration Failed #31401 (CORE One) #35401 (CORE One L) #36401 (CORE One INDX) #17401 (XL) #26401 (MK4S) #13401 (MK4) #27401 (MK3.9S) #21401 (MK3.9) #28401 (MK3.5S) #23401 (MK3.5) #12401 (MINI)

QR Error codes

Homing error Z #31301 (CORE One) #35301 (CORE One L) #36301 (CORE One INDX) #26301 (MK4S) #13301 (MK4) #27301 (MK3.9S) #21301 (MK3.9)

Hotend thermal runaway #31204 (CORE One) #35204 (CORE One L) #26204 (MK4S) #13204 (MK4) #27204 (MK3.9S) #21204 (MK3.9)

Bed thermal runaway #31203 (CORE One) #35203 (CORE One L) #36203 (CORE One INDX) #26203 (MK4S) #13203 (MK4) #27203 (MK3.9S) #21203 (MK3.9) #28203 (MK3.5S) #23203 (MK3.5) 

I2C Send failed #31311 (CORE One) #35311 (CORE One L) #36311 (CORE One INDX) #26311 (MK4S) #13311 (MK4) #27311 (MK3.9S) #21311 (MK3.9) #28311 (MK3.5S) #23311 (MK3.5) #12311 (MINI/+)

Bed mintemp error #31207 (CORE One) #35207 (CORE One L) #36207 (CORE One INDX) #26207 (MK4S) #13207 (MK4) #27207 (MK3.9S) #21207 (MK3.9) #28207 (MK3.5S) #23207 (MK3.5)

Loadcell Timeout #31528 (CORE One) #35528 (CORE One L) #26528 (MK4S) #36528 (CORE One INDX) #13528 (MK4) #27528 (MK3.9S) #21528 (MK3.9)

I2C Receive Failed #31315 (CORE One) #35315 (CORE One L) #36315 (CORE One INDX) #26315 (MK4S) #13315 (MK4) #27315 (MK3.9S) #21315 (MK3.9) #28315 (MK3.5S) #23315 (MK3.5) #12315 (MINI/+)

No FW on USB #31604 (CORE One) #35604 (CORE One L) #36604 (CORE One INDX) #26604 (MK4S) #13604 (MK4) #27604 (MK3.9S) #21604 (MK3.9) #28604 (MK3.5S) #23604 (MK3.5) #17604 (XL) #12604 (MINI)

USB not connected #31602 (CORE One) #35602 (CORE One L) #36602 (CORE One INDX) #26602 (MK4S) #13602 (MK4) #27602 (MK3.9S) #21602 (MK3.9) #28602 (MK3.5S) #23602 (MK3.5) #17602 (XL) #12602 (MINI)

Precise Refinement Failed #31102 (CORE One) #35102 (CORE One L) #36102 (CORE One INDX) #17102 (XL)

ESP Error #31504 (CORE One) #35504 (CORE One L) #26504 (MK4S) #13504 (MK4) #27504 (MK3.9S) #21504 (MK3.9) #28504 (MK3.5S) #23504 (MK3.5) 

FW in internal flash corrupted #31608 (CORE One) #35608 (CORE One L) #36608 (CORE One INDX) #26608 (MK4S) #13608 (MK4) #27608 (MK3.9S) #21608 (MK3.9) #28608 (MK3.5S) #23608 (MK3.5) #17608 (XL) #12608 (MINI)

Bed maxtemp error #31205 (CORE One) #35205 (CORE One L) #36205 (CORE One INDX) #26205 (MK4S) #13205 (MK4) #27201 (MK3.9S) #21201 (MK3.9) #28201 (MK3.5S) #23201 (MK3.5)

Loadcell Bad Configuration #31527 (CORE One) #35527 (CORE One L) #36527 (CORE One INDX) #26527 (MK4S) #13527 (MK4) #27527 (MK3.9S) #21527 (MK3.9)

Emergency stop #31510 (CORE One) #35510 (CORE One L) #36510 (CORE One INDX) #26510 (MK4S) #13510 (MK4) #17510 (XL) #27510 (MK3.9S) #21510 (MK3.9) #28510 (MK3.5S) #23510 (MK3.5) #12510 (MINI)

Marlin Request Timeout #31530 (CORE One) #35530 (CORE One L) #36530 (CORE One INDX) #26530 (MK4S) #13530 (MK4) #27530 (MK3.9S) #21530 (MK3.9) #28530 (MK3.5S) #23530 (MK3.5)

Out of Memory #31507 (CORE One) #35507 (CORE One L) #26507 (MK4S) #13507 (MK4) #27507 (MK3.9S) #21507 (MK3.9) #28507 (MK3.5S) #23507 (MK3.5) #31507 (CORE One)

BBF Initialization Failed #31532 (CORE One) #35532 (CORE One L) #36532 (CORE One INDX) #26532 (MK4S) #13532 (MK4) #27532 (MK3.9S) #21532 (MK3.9) #28532 (MK3.5S) #23532 (MK3.5)

File system error #31613 (CORE One) #35613 (CORE One L) #36613 (CORE One INDX) #26613 (MK4S) #13613 (MK4) #27613 (MK3.9S) #21613 (MK3.9) #28613 (MK3.5S) #23613 (MK3.5)

Signature verification failed #31606 (CORE One) #35606 (CORE One L) #36606 (CORE One INDX) #26606 (MK4S) #13606 (MK4) #27606 (MK3.9S) #21606 (MK3.9) #28606 (MK3.5S) #23606 (MK3.5)

Blue Screen of Death (BSOD) #31538 (CORE One) #35538 (CORE One L) #36538 (CORE One INDX) #26538 (MK4S) #13538 (MK4) #27538 (MK3.9S) #17538 (XL) #21538 (MK3.9) #28538 (MK3.5S) #23538 (MK3.5) #12538 (MINI)

Invalid FW size on USB #31603 (CORE One) #35603 (CORE One L) #36603 (CORE One INDX) #26603 (MK4S) #13603 (MK4) #27603 (MK3.9S) #21603 (MK3.9) #28603 (MK3.5S) #23603 (MK3.5) #17603 (XL) #12603 (MINI)

BBF Allocation Failed #31531 (CORE One) #35531 (CORE One L) #36531 (CORE One INDX) #26531 (MK4S) #13531 (MK4) #27531 (MK3.9S) #21531 (MK3.9) #28531 (MK3.5S) #23531 (MK3.5)

Unsupported printer version #31611 (CORE One) #35611 (CORE One L) #36611 (CORE One INDX) #26611 (MK4S) #13611 (MK4) #27611 (MK3.9S) #21611 (MK3.9) #28611 (MK3.5S) #23611 (MK3.5) #17611 (XL) #12611 (MINI)

ESP Error #31506 (CORE One) #35506 (CORE One L) #26506 (MK4S) #13506 (MK4) #27506 (MK3.9S) #21506 (MK3.9) #28506 (MK3.5S) #23506 (MK3.5)

ESP Error #31505 (CORE One) #35505 (CORE One L) #26505 (MK4S) #13505 (MK4) #27505 (MK3.9S) #21505 (MK3.9) #28505 (MK3.5S) #23505 (MK3.5)

Unsupported BBF version #31614 (CORE One) #35614 (CORE One L) #36614 (CORE One INDX) #26614 (MK4S) #13614 (MK4) #27614 (MK3.9S) #21614 (MK3.9) #28614 (MK3.5S) #23614 (MK3.5)

PNG Buffer Full #31508 (CORE One) #35508 (CORE One L) #17508 (XL) #26508 (MK4S) #13508 (MK4) #27508 (MK3.9S) #21508 (MK3.9) #28508 (MK3.5S) #23508 (MK3.5) #12508 (MINI)

EEPROM I2C Receive Busy #31316 (CORE One) #35316 (CORE One L) #36316 (CORE One INDX) #26316 (MK4S) #13316 (MK4) #27316 (MK3.9S) #21316 (MK3.9) #28316 (MK3.5S) #23316 (MK3.5) #12316 (MINI/+)

Hash verification failed #31607 (CORE One) #35607 (CORE One L) #36607 (CORE One INDX) #26607 (MK4S) #13607 (MK4) #27607 (MK3.9S) #21607 (MK3.9) #28607 (MK3.5S) #23607 (MK3.5) #17607 (XL) #12607 (MINI)

LED Memory Error #31529 (CORE One) #35529 (CORE One L) #36529 (CORE One INDX) #26529 (MK4S) #13529 (MK4) #27529 (MK3.9S) #21529 (MK3.9) #28529 (MK3.5S) #23529 (MK3.5)

I2C Send Timeout #31313 (CORE One) #35313 (CORE One L) #36313 (CORE One INDX) #26313 (MK4S) #13313 (MK4) #27313 (MK3.9S) #21313 (MK3.9) #28313 (MK3.5S) #23313 (MK3.5) #13313 (MINI/+)

I2C Send busy #31312 (CORE One) #35312 (CORE One L) #36312 (CORE One INDX) #26312 (MK4S) #13312 (MK4) #27312 (MK3.9S) #21312 (MK3.9) #28312 (MK3.5S) #23312 (MK3.5) #12312 (MINI/+)

I2C Receive Timeout #31317 (CORE One) #35317 (CORE One L) #36317 (CORE One INDX) #26317 (MK4S) #13317 (MK4) #27317 (MK3.9S) #21317 (MK3.9) #28317 (MK3.5S) #23317 (MK3.5) #12317 (MINI/+)

I2C Send Undefined #31314 (CORE One) #35314 (CORE One L) #36314 (CORE One INDX) #26314 (MK4S) #13314 (MK4) #27314 (MK3.9S) #21314 (MK3.9) #28314 (MK3.5S) #23314 (MK3.5) #12314 (MINI/+)

I2C Receive undefined #31318 (CORE One) #35318 (CORE One L) #36318 (CORE One INDX) #26318 (MK4S) #13318 (MK4) #27318 (MK3.9S) #21318 (MK3.9) #28318 (MK3.5S) #23318 (MK3.5) #12318 (MINI/+)

Under-extrusion (Nextruder printers)

Extruder not detected #31615 (CORE One) #35615 (CORE One L) #36615 (CORE One INDX) #26615 (MK4S) #13615 (MK4) #27615 (MK3.9S) #21615 (MK3.9) #28615 (MK3.5S) #23615 (MK3.5)

Adjusting belt tension (CORE One/+, CORE One INDX, CORE One L/+)

Heaters Timeout #31817 (CORE One) #35817 (CORE One L) #36817 (CORE One INDX) #26817 (MK4S) #13817 (MK4) #27817 (MK3.9S) #21817 (MK3.9) #28817 (MK3.5S) #23817 (MK3.5) #17817 (XL) #12817 (MINI)

Door Open #31110 (CORE One) #35110 (CORE One L) #36110 (CORE One INDX)

Firmware x printer mismatch #31609 (CORE One) #35609 (CORE One L) #36609 (CORE One INDX) #17609 (XL) #26609 (MK4S) #13609 (MK4) #27609 (MK3.9S) #21609 (MK3.9) #28609 (MK3.5S) #23609 (MK3.5) #12609 (MINI)

Nozzle Timeout #31819 (CORE One) #35819 (CORE One L) #36819 (CORE One INDX) #26819 (MK4S) #13819 (MK4) #27819 (MK3.9S) #21819 (MK3.9) #28819 (MK3.5S) #23819 (MK3.5) #17819 (XL) #12819 (MINI)

Unknown error #31601 (CORE One) #35601 (CORE One L) #36601 (CORE One INDX) #26601 (MK4S) #13601 (MK4) #27601 (MK3.9S) #21601 (MK3.9) #28601 (MK3.5S) #23601 (MK3.5) #17601 (XL) #12601 (MINI)

Uneven bed #31111 (CORE One) #35111 (CORE One L) #36111 (CORE One INDX)

Ceiling clearance violation #31112 (CORE One) #35112 (CORE One L) #36112 (CORE One INDX)

Filament sensor stuck #31113 (CORE One) #35113 (CORE One L) #36113 (CORE One INDX) #17113 (XL) #26113 (MK4S) #13113 (MK4) #27113 (MK3.9S) #21113 (MK3.9) #28113 (MK3.5S) #23113 (MK3.5) #12113 (MINI/+)

Filament Sensors Disabled #31115 (CORE One) #35115 (CORE One L) #36102 (CORE One INDX) #17115 (XL) #26115 (MK4S) #13115 (MK4) #27115 (MK3.9S) #21115 (MK3.9) #28115 (MK3.5S) #23115 (MK3.5) #12115 (MINI/+)

Chamber MAXTEMP error #31214 (CORE One) #35214 (CORE One L) #36214 (CORE One INDX)

Failed to Reach Chamber Temperature #31259 (CORE One) #35259 (CORE One L) #36259 (CORE One INDX)

Puppy error #31511 (CORE One) #35511 (CORE One L) #36511 (CORE One INDX)

Puppy error #31512 (CORE One) #35512 (CORE One L) #36512 (CORE One INDX)

Puppy error #31513 (CORE One) #35513 (CORE One L) #36513 (CORE One INDX)

Puppy error #31515 (CORE One) #35515 (CORE One L) #36515 (CORE One INDX)

Puppy error #31516 (CORE One) #35516 (CORE One L) #36516 (CORE One INDX)

Puppy error #31517 (CORE One) #35517 (CORE One L) #36517 (CORE One INDX)

Puppy error #31518 (CORE One) #35518 (CORE One L) #36518 (CORE One INDX)

Puppy error #31519 (CORE One) #35519 (CORE One L) #36519 (CORE One INDX)

Puppy error #31520 (CORE One) #35520 (CORE One L) #36520 (CORE One INDX)

Puppy error #31521 (CORE One) #35521 (CORE One L) #36521 (CORE One INDX)

Puppy error #31522 (CORE One) #35522 (CORE One L) #36522 (CORE One INDX)

Chamber overheating #31260 (CORE One) #35260 (CORE One L) #36260 (CORE One INDX) #17260 (XL)

Chamber temperature is critical #31261 (CORE One) #35261 (CORE One L) #36261 (CORE One INDX) #17261 (XL)

Chamber Mintemp error #31215 (CORE One) #35215 (CORE One L) #36215 (CORE One INDX)

ESP not connected #31533 (CORE One) #35533 (CORE One L) #26533 (MK4S) #13533 (MK4) #27533 (MK3.9S) #21533 (MK3.9) #28533 (MK3.5S) #23533 (MK3.5)

Unknown file system #31703 (CORE One) #35703 (CORE One L) #36703 (CORE One INDX) #26703 (MK4S) #13703 (MK4) #27703 (MK3.9S) #21703 (MK3.9) 

Crash recovery home fail #31812 (CORE One) #35812 (CORE One L) #26812 (MK4S) #13812 (MK4) #27812 (MK3.9S) #21812 (MK3.9) #28812 (MK3.5S) #23812 (MK3.5) #17812 (XL) #12812 (MINI)

G-code cropped #31535 (CORE One) #35535 (CORE One L) #36535 (CORE One INDX) #17535 (XL) #26535 (MK4S) #13535 (MK4) #27535 (MK3.9S) #21535 (MK3.9) #28535 (MK3.5S) #23535 (MK3.5) #12535 (MINI)

G-code corruption #31534 (CORE One) #35534 (CORE One L) #36534 (CORE One INDX) #17534 (XL) #26534 (MK4S) #13534 (MK4) #27534 (MK3.9S) #21534 (MK3.9) #28534 (MK3.5S) #23534 (MK3.5) #12534 (MINI)

G-code metrics config change #31403 (CORE One) #35403 (CORE One L) #36403 (CORE One INDX) #17403 (XL) #26403 (MK4S) #13403 (MK4) #27403 (MK3.9S) #21403 (MK3.9) #28403 (MK3.5S) #23403 (MK3.5) #12403 (MINI)

Display problem detected #36324 (INDX) #31324 (CORE One) #35324 (CORE One L) #17324 (XL) #26324 (MK4S) #13324 (MK4) #27324 (MK3.9S) #21324 (MK3.9) #28324 (MK3.5S) #23324 (MK3.5)

Loading obstruction #31119 (CORE One) #35119 (CORE One L) #17119 (XL)

Homing calibration needed #31118 (CORE One) #35118 (CORE One L) #36118 (CORE One INDX)#17118 (XL)

Calibrate homing from menu #31120 (CORE One) #35120 (CORE One L) #36120 (CORE One INDX) #17120 (XL)

MCU overheat #35270

PCB overheat #35271

Data Timeout #35330

AC Controller Fault #35273

AC Controller Fault #35272

Link lost #35331 (CORE One L)

AC controller fault #35332

AC controller fault #35333 (CORE One L)

AC controller fault #35334 (CORE One L)

AC controller fault #35335 (CORE One L)

AC controller fault #35336 (CORE One L)

AC controller fault #35337 (CORE One L)

AC controller fault #35338 (CORE One L)

AC controller fault #35339 (CORE One L)

Selftest failed (CORE One L/+)

Bed fan is not spinning #35849 (CORE One L)

PSU fan is not spinning #35850 (CORE One L)