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                  5. QR Error codes
                  7. 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)
                   

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                  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)

                  Relevant for

                  INDX family
                  CORE One family
                  MK4 family
                  XL family
                  MK3.9 family
                  +
                  8 comments
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                  What happened? 

                  During the configuration of Prusa Connect on the Original Prusa Printers, an error can occur, and the printer shows the message "Registration to Prusa Connect failed due to: ~". In place of ~, a text with more details is displayed. 

                  Error name: Connect Registration Failed

                  Error code: #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)

                  How to fix it? 

                  Follow the instructions in the Connect Registration Failed guidepost, common to our printers with Buddy firmware, with more details on possible causes for this error and their solutions.

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                  Topics

                  • Troubleshooting
                    • QR Error codes
                      • QR Error codes
                      • Toolchanger error #17135 (XL) #36135 (CORE One INDX)
                      • Bed preheat error #31201 (CORE One) #35201 (CORE One L) #36201 (CORE One INDX) #26201 (MK4S) #13201 (MK4) #27201 (MK3.9S) #21201 (MK3.9) #28201 (MK3.5S) #23201 (MK3.5) 
                      • 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)
                      • 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) 
                      • Hotend thermal runaway #31204 (CORE One) #35204 (CORE One L) #26204 (MK4S) #13204 (MK4) #27204 (MK3.9S) #21204 (MK3.9)
                      • 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)
                      • 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)
                      • 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)
                      • 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)
                      • 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)
                      • 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)
                      • Unsupported printer type #31610 (CORE One) #35610 (CORE One L) #36610 (CORE One INDX) #26610 (MK4S) #13610 (MK4) #27610 (MK3.9S) #21610 (MK3.9) #28610 (MK3.5S) #23610 (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)
                      • No FW in internal flash #31612 (CORE One) #35612 (CORE One L) #36612 (CORE One INDX) #26612 (MK4S)  #13612 (MK4) #27612 (MK3.9S) #21612 (MK3.9) #28612 (MK3.5S) #23612 (MK3.5) #20612
                      • 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)
                      • 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)
                      • Flash erase error #31605 (CORE One) #35605 (CORE One L) #36605 (CORE One INDX) #26605 (MK4S) #13605 (MK4) #27605 (MK3.9S) #21605 (MK3.9) #28605 (MK3.5S) #23605 (MK3.5) #17605 (XL) #12605 (MINI)
                      • Hotend mintemp error #31208 (CORE One) #35208 (CORE One L) #26208 (MK4S) #13208 (MK4) #27208 (MK3.9S) #21208 (MK3.9)
                      • Hotend maxtemp error #31206 (CORE One) #35206 (CORE One L) #26206 (MK4S) #13206 (MK4) #27206 (MK3.9S) #21206 (MK3.9) #28206 (MK3.5S) #23206 (MK3.5)
                      • Homing error Z #31301 (CORE One) #35301 (CORE One L) #36301 (CORE One INDX) #26301 (MK4S) #13301 (MK4) #27301 (MK3.9S) #21301 (MK3.9)
                      • 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)
                      • 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)
                      • Homing error Y #31305 (CORE One) #35305 (CORE One L) #36305 (CORE One INDX) #17305 (XL)
                      • USB Port overcurrent #31306 (CORE One) #35306 (CORE One L) #36306 (CORE One INDX) #26306 (MK4S) #13306 (MK4) #27306 (MK3.9S) #21306 (MK3.9) #28306 (MK3.5S) #23306 (MK3.5) #12306 (MINI/+)
                      • USB Device Overcurrent #31307 (CORE One) #35307 (CORE One L) #36307 (CORE One INDX) #26307 (MK4S) #13307 (MK4) #27307 (MK3.9S) #21307 (MK3.9) #28307 (MK3.5S) #23307 (MK3.5) #12307 (MINI/+)
                      • Nozzle Heater Overcurrent #31308 (CORE One) #35308 (CORE One L) #36308 (CORE One INDX) #26308 (MK4S) #13308 (MK4) #27308 (MK3.9S) #21308 (MK3.9)
                      • Heatbed Port Overcurrent #31309 (CORE One) #35309 (CORE One L) #26309 (MK4S) #13309 (MK4) #27309 (MK3.9S) #21309 (MK3.9) #28309 (MK3.5S) #23309 (MK3.5) #12309 (MINI) #36309 (INDX)
                      • MMU Overcurrent #31310 (CORE One) #35310 (CORE One L) #26310 (MK4S) #13310 (MK4) #27310 (MK3.9S) #21310 (MK3.9) #28310 (MK3.5S) #23310 (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)
                      • 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)
                      • 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/+)
                      • 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 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 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 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/+)
                      • 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/+)
                      • 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 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/+)
                      • Loadcell Not Calibrated #31523 (CORE One) #35223 (CORE One L) #26523 (MK4S) #13523 (MK4) #27523 (MK3.9S) #21523 (MK3.9)
                      • Loadcell Tare Error #31524 (CORE One) #35524 (CORE One L) #26524 (MK4S) #13524 (MK4) #27524 (MK3.9S) #21524 (MK3.9)
                      • Loadcell Tare Failed #31525 (CORE One) #35525 (CORE One L) #26525 (MK4S) #13525 (MK4) #27525 (MK3.9S) #21525 (MK3.9)
                      • Loadcell Bad Configuration #31527 (CORE One) #35527 (CORE One L) #36527 (CORE One INDX) #26527 (MK4S) #13527 (MK4) #27527 (MK3.9S) #21527 (MK3.9)
                      • Loadcell Timeout #31528 (CORE One) #35528 (CORE One L) #26528 (MK4S) #36528 (CORE One INDX) #13528 (MK4) #27528 (MK3.9S) #21528 (MK3.9)
                      • 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)
                      • 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)
                      • 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)
                      • 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)
                      • 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) 
                      • 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)
                      • 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)
                      • Heatbreak MINTEMP Error #31211 (CORE One) #35211 (CORE One L) #26211 (MK4S) #13211 (MK4) #27211 (MK3.9S) #21211 (MK3.9)
                      • Heatbreak MAXTEMP Error #31212 (CORE One) #35212 (CORE One L) #26212 (MK4S) #13212 (MK4) #27212 (MK3.9S) #21212 (MK3.9) 
                      • Homing error X #26304 (MK4S) #13304 (MK4) #27304 (MK3.9S) #21304 (MK3.9) #28304 (MK3.5S) #23304 (MK3.5)
                      • Precise Refinement Failed #31102 (CORE One) #35102 (CORE One L) #36102 (CORE One INDX) #17102 (XL)
                      • Power Panic #36321 (INDX) #31321 (CORE One) #35321 (CORE One L) #26321 (MK4S) #13321 (MK4) #27321 (MK3.9S) #21321 (MK3.9) #28321 (MK3.5S) #23321 (MK3.5) 
                      • MCU Maxtemp Error #31213 (CORE One) #35213 (CORE One L) #26213 (MK4S) #13213 (MK4) #27213 (MK3.9S) #21213 (MK3.9) #17213 (XL) #12213 (MINI/+)
                      • Firmware Update Required #31701 (CORE One) #35701 (CORE One L) #36701 (CORE One INDX) #26701 (MK4S) #13701 (MK4) #27701 (MK3.9S) #21701 (MK3.9) #28701 (MK3.5S) #23701 (MK3.5)
                      • Hotend preheat error #28202 (MK3.5S) #23202 (MK3.5)
                      • Hotend thermal runaway #28204 (MK3.5S) #23204 (MK3.5)
                      • Hotend mintemp error #28208 (MK3.5S) #23208 (MK3.5)
                      • Hotend temp not matching #28210 (MK3.5S) #23210 (MK3.5)
                      • 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)
                      • Nozzle Cleaning Failed #31834 (CORE One) #35834 (CORE One L) #26834 (MK4S) #13834 (MK4) #27834 (MK3.9S) #21834 (MK3.9) #17834 (XL)
                      • Stuck filament detection #31101 (CORE One) #35101 (CORE One L) #26101 (MK4S) #13101 (MK4) #27101 (MK3.9S) #21101 (MK3.9) #17108 (XL)
                      • Heatbed temp not matching #31209 (CORE One) #35209 (CORE One L) #26209 (MK4S) #13209 (MK4) #27209 (MK3.9S) #21209 (MK3.9) #28209 (MK3.5S) #23209 (MK3.5)
                      • 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)
                      • 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)
                      • Steel sheet not detected #31109 (CORE One) #35109 (CORE One L) #36109 (CORE One INDX)
                      • 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)
                      • 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)
                      • 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)
                      • 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)
                      • Homing error X #31304 (CORE One) #35304 (CORE One L) #36304 (CORE One INDX) #17304 (XL)
                      • 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)
                      • Fil. sensor troubleshooting #31114 (CORE One) #26114 (MK4S) #13114 (MK4) #27114 (MK3.9S) #21114 (MK3.9) #28114 (MK3.5S) #23114 (MK3.5)
                      • Chamber Mintemp error #31215 (CORE One) #35215 (CORE One L) #36215 (CORE One INDX)
                      • Accelerometer communication failed #31323 (CORE One) #35323 (CORE One L) #26323 (MK4S) #13323 (MK4) #27323 (MK3.9S) #21323 (MK3.9) #28323 (MK3.5S) #23323 (MK3.5)
                      • 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) 
                      • MCU in Buddy is overheated #31825 (CORE One) #35825 (CORE One L) #26825 (MK4S) #27825 (MK3.9S) #28825 (MK3.5S) #13825 (MK4) #21825 (MK3.9) #23825 (MK3.5) #17825 (XL) #12825 (MINI)
                      • The heatbed cooled down during the power outage #31808 (CORE One) #35808 (CORE One L) #26808 (MK4S) #27808 (MK3.9S) #28808 (MK3.5S) #13808 (MK4) #21808 (MK3.9) #23808 (MK3.5) #17808 (XL) 
                      • The G-code isn't fully compatible #31803 (CORE One) #26803 (MK4S) #27803 (MK3.9S) #28803 (MK3.5S) #13803 (MK4) #21803 (MK3.9) #23803 (MK3.5) #17803 (XL) #12803 (MINI)
                      • Print preview wrong filament #31805 (CORE One/+) #35805 (CORE One L) #36805 (CORE One INDX) #26805 (MK4S) #27805 (MK3.9S) #28805 (MK3.5S) #13805 (MK4) #21805 (MK3.9) #23805 (MK3.5) #17805 (XL) #12805 (MINI)
                      • Filament not detected #31804 (CORE One) #35804 (CORE One L) #26804 (MK4S) #27804 (MK3.9S) #28804 (MK3.5S) #13804 (MK4) #21804 (MK3.9) #23804 (MK3.5) #17804 (XL) #12804 (MINI)
                      • Print preview unfinished selftest #31801 (CORE One) #35801 (CORE One L) #26801 (MK4S) #27801 (MK3.9S) #28801 (MK3.5S) #13801 (MK4) #21801 (MK3.9) #23801 (MK3.5) #17801 (XL) #12801 (MINI)
                      • Open chamber ventilation #31837 (CORE One) #36837 (CORE One INDX)
                      • Close chamber ventilation #31838 (CORE One) #36838 (CORE One INDX)
                      • Print fan error #31816 (CORE One) #26816 (MK4S) #27816 (MK3.9S) #13816 (MK4) #21816 (MK3.9) #17816 (XL)
                      • Print preview MMU filament inserted #31806 (CORE One) #26806 (MK4S) #13806 (MK4) #27806 (MK3.9S) #21806 (MK3.9) #28806 (MK3.5S) #23806 (MK3.5)
                      • Crash recovery axis long #31809 (CORE One) #35809 (CORE One L) #26809 (MK4S) #13809 (MK4) #27809 (MK3.9S) #21809 (MK3.9) #28809 (MK3.5S) #23809 (MK3.5) #17809 (XL) #12809 (MINI)
                      • Crash recovery repeated crash #31811 (CORE One) #35811 (CORE One L) #26811 (MK4S) #13811 (MK4) #27811 (MK3.9S) #21811 (MK3.9) #28811 (MK3.5S) #23811 (MK3.5) #17811 (XL) #12811 (MINI)
                      • Crash recovery axis short #31810 (CORE One) #35810 (CORE One L) #26810 (MK4S) #13810 (MK4) #27810 (MK3.9S) #21810 (MK3.9) #28810 (MK3.5S) #23810 (MK3.5) #17810 (XL) #12810 (MINI)
                      • 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)
                      • Hotend fan error #31828 (CORE One) #35828 (CORE One L) #26828 (MK4S) #27828 (MK3.9S) #13828 (MK4) #21828 (MK3.9) #17828 (XL)
                      • New firmware available #31802 (CORE One) #35802 (CORE One L) #26802 (MK4S) #13802 (MK4) #27802 (MK3.9S) #21802 (MK3.9) #28802 (MK3.5S) #23802 (MK3.5) #17802 (XL) #12802 (MINI)
                      • Chamber filtration fan is not spinning #31840 (CORE One) #35840 (CORE One L) #36840 (CORE One INDX)
                      • USB flash disk error #31821 (CORE One) #35821 (CORE One L) #26821 (MK4S) #13821 (MK4) #27821 (MK3.9S) #21821 (MK3.9) #28821 (MK3.5S) #23821 (MK3.5) #17821 (XL) #12821 (MINI)
                      • MCU in Modular Bed is overheated #17827 (XL)
                      • Hotend temp discrepancy #31818 (CORE One) #17818 (XL) #26818 (MK4S) #13818 (MK4) #27818 (MK3.9S) #21818 (MK3.9) #28818 (MK3.5S) #23818 (MK3.5) #12818 (MINI)
                      • Steppers timeout #31820 (CORE One) #35820 (CORE One L) #17820 (XL) #26820 (MK4S) #13820 (MK4) #27820 (MK3.9S) #21820 (MK3.9) #28820 (MK3.5S) #23820 (MK3.5) #12820 (MINI)
                      • Heatbreak thermistor fail #31822 (CORE One) #35822 (CORE One L) #17822 (XL) #26822 (MK4S) #13822 (MK4) #27822 (MK3.9S) #21822 (MK3.9)
                      • Print preview tools mapping #31814 (CORE One) #36814 (CORE One INDX) #17814 (XL) #26814 (MK4S) #13814 (MK4) #27814 (MK3.9S) #21814 (MK3.9) #28814 (MK3.5S) #23814 (MK3.5)
                      • Quick pause #31835 (CORE One) #35835 (CORE One L) #36835 (CORE One INDX) #17835 (XL) #26835 (MK4S) #13835 (MK4) #27835 (MK3.9S) #21835 (MK3.9) #28835 (MK3.5S) #23835 (MK3.5) #12835 (MINI)
                      • Not downloaded #31824 (CORE One) #35824 (CORE One L) #17824 (XL) #26824 (MK4S) #13824 (MK4) #27824 (MK3.9S) #21824 (MK3.9) #28824 (MK3.5S) #23824 (MK3.5) #12824 (MINI)
                      • Filament runout #31829 (CORE One) #35829 (CORE One L) #17829 (XL) #26829 (MK4S) #13829 (MK4) #27829 (MK3.9S) #21829 (MK3.9) #28829 (MK3.5S) #23829 (MK3.5) #12829 (MINI)
                      • MMU load unload error #31815 (CORE One) #26815 (MK4S) #13815 (MK4) #27815 (MK3.9S) #21815 (MK3.9) #28815 (MK3.5S) #23815 (MK3.5)
                      • Probing failed #31833 (CORE One) #35833 (CORE One L) #36833 (CORE One INDX) #17833 (XL) #26833 (MK4S) #13833 (MK4) #27833 (MK3.9S) #21833 (MK3.9) #28833 (MK3.5S) #23833 (MK3.5) #12833 (MINI)
                      • Nozzle does not have round section #17823 (XL) #28823 (MK3.5S) #23823 (MK3.5)
                      • MCU in Dwarf is overheated #17826 (XL)
                      • Loading timeout #31836 (CORE One) #35836 (CORE One L) #17836 (XL) #26836 (MK4S) #13836 (MK4) #27836 (MK3.9S) #21836 (MK3.9) #28836 (MK3.5S) #23836 (MK3.5) #12836 (MINI)
                      • Selftest not passed #31537 (CORE One) #35537 (CORE One L) #36537 (CORE One INDX) #17537 (XL) #26537 (MK4S) #13537 (MK4) #27537 (MK3.9S) #21537 (MK3.9) #28537 (MK3.5S) #23537 (MK3.5) #12537 (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)
                      • Enclosure filter expiration warning #31831 (CORE One) #35831 (CORE One L) #36831 (CORE One INDX) #17831 (XL)
                      • Enclosure filter expiration #31832 (CORE One) #35832 (CORE One L) #36832 (CORE One INDX) #17832 (XL)
                      • File error #31807 (CORE One/+) #35807 (CORE One L) #17807 (XL) #26807 (MK4S) #13807 (MK4) #27807 (MK3.9S) #21807 (MK3.9) #28807 (MK3.5S) #23807 (MK3.5) #12807 (MINI/+)
                      • Chamber Cooling Fan Error #31839 (CORE One) #35839 (CORE One L) #36839 (CORE One INDX)
                      • Enclosure fan error #17830 (XL)
                      • Thermal runaway #17203 (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)
                      • Bed fan is not spinning #35849 (CORE One L)
                      • PSU fan is not spinning #35850 (CORE One)
                      • Calibrate dock from menu #17136 (XL) #36136 (CORE One INDX)
                      • Toolchanger error #36135 (CORE One INDX) #17135 (XL)
                      • Retry tool park 36128 (CORE One INDX)
                      • Unknown nozzle #36121 (CORE One INDX)
                      • Unknown nozzle #36122 (CORE One INDX)
                      • Tool park failed #36127 (Core One INDX)
                      • Abort print? #36129 (CORE One INDX)
                      • Hotend preheat error #36202 (CORE One INDX)
                      • Chamber temperature is critical #36261 (INDX) #31261 (CORE One L) #35261 (CORE One) #17261 (XL)
                      • Unexpected tool #36132 (CORE One INDX)
                      • Tool lost #36137 (CORE One INDX)
                      • Tool pickup failed #36138 (CORE One INDX)
                      • Tool park failed #36139 (CORE One INDX)
                      • Unsafe XY tool offset #36133 (CORE One INDX)
                      • Unsafe Sensor Position #36134 (CORE One INDX)
                      • Maintenance warning #31117 (CORE One) #26117 (MK4S) #13117 (MK4) #27117 (MK3.9S) #21117 (MK3.9) #28117 (MK3.5S) #23117 (MK3.5)
                      • Maintenance failure warning #28116 (MK3.5S) #23116 (MK3.5)
                      • Maintenance failure warning #31116 (CORE One) #26116 (MK4S) #13116 (MK4) #27116 (MK3.9S) #21116 (MK3.9)
                    • Diagnostics
                    • Print Quality Troubleshooting
                    • Printer troubleshooting
                    • Print Error Messages

                  3 comments

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                  PeSko
                  •
                  Tiez mi to nefunguje, neviem sparovat tlaciaren, ktora je na Wifi, s PrusaConnect
                  Reply
                  jmilesr11
                  •
                  I'm getting the same "refused" response with no printer code being generated - I done a factory reset and still the same problem - the printer is on my wifi network and there is no firewall
                  Reply
                  JLR
                  •
                  It says Refused. More details at prusa.io:13401
                  Reply
                  ZSMSSVAB
                  •
                  I have the same problém.
                  Reply
                  fletrir
                  •
                  Make sure your printer is connected to WiFi.
                  Reply
                  jeremALL
                  •
                  pour ma part, j'ai obtenu ce message juste après m'être connecté en WIFI par NFC.
                  Reply
                  dom
                  •
                  Idem, the same

                  When configured with NFC, the prusa connect registration resulted in "refused".
                  After manually entered the WiFi credentials, the registration succeeded.
                  (MK4S MK4_MK4S_MK3.9_MK3.9S_firmware_6.2.4.bbf)
                  Reply
                  Douglas - Prusa Research
                  •
                  Bonjour,

                  si vous avez des difficultés avec ce message d'erreur ou si celle-ci persiste, veuillez contacter notre service de support.

                  https://help.prusa3d.com/fr/article/support-client_2287
                  Reply