Oki ES3640MFP Service & Troubleshooting Manual page 91

Self Diagnostic Error Codes (Printer)
Code
310 The Printer Engine Top Cover is Open
320 Fuser Unit is Detected as Missing
321 Motor Overheated
323 to 326 Open Cover Paper Thickness Error
330 Belt Missing Error
340 to 343 ID Unit Missing Error
340 = Y
350 to 353 ID Unit Life Error
350 = Y
354 Fuser Life Error
355 Belt Life Error
360 Double Side Printer Unit Error
370 to 372 Duplex Paper Jam
380 to 383
Paper Jam Error
380 = Cassette Areas
381 = Between Black ID and Fuser
382 = Between Fuser and Delivery
383 = Duplex
389 to 395 Paper Jam Error
400 Paper Size Error
410 to 413 Toner Out Error
410 = Y
Cause/Description
341 = M 342 = C 343 = K
351 = M 352 = C 353 = K
411 = M 412 = C 413 = K
Remedy
See "Top Cover Open Error"
See "Fuser Unit Detected as Missing"
See " Motor Overheating Error"
Check / Clean Sensor
See " Error in Transfer Belt"
See "C, M, Y, K Image Drum Unit Failure"
See " ID Unit Life Error"
See "Fuser Life Error"
See "Belt Life Error"
See " Unsupported Duplex ROM Error"
Check Sensor / Connections
See "Jam Troubleshooting Section"
Check Sensor / Connections
See "Jam Troubleshooting Section"
Check Sensor / Connections
See "Jam Troubleshooting Section"
Adjust Paper Guides
Check / Replace Paper Size PCB
See "General Troubleshooting"
See "Toner Out Error"