4. Troubleshooting► Error CodeC3–1110 / C3–1140 / C3–1150 / C3–1170► Error messagePrepare new imaging unitEnd of life, Replace with new imaging unitReplace with new imaging unit► SymptomImaging unit is at the end of its life.► Troubleshooting methodCheck the life remaining of the imaging unit.If its life is at the end, turn the machine off and replace the imaging unit with new one.► Error CodeC3–1411► Error messageImaging unit is not installed. Install the unit► SymptomThe imaging unit is not installed. / The machine can’t detect the imaging unit.► Troubleshooting method1) Open the front cover. Check if the imaging unit is installed.2) Remove and reinstall the imaging unit.3) Check if the contact terminal is contaminated or broken. Clean the contact terminal.4) Check if the CRUM harness is connected correctly. Reconnect it.5) If the harness is defective, replace it.6) If the problem persists, replace the imaging unit with new one.► Error CodeC3–1512► Error messageImaging unit is not compatible. Check the user guide► SymptomImaging unit is not compatible.► Troubleshooting method1) Open the front cover. Remove the imaging unit.2) Check if the label information of the imaging unit is same with the machine’s one. (ex. /SEE)3) If label information is different from the machine or the imaging unit is not a samsung genuine, replace it witha new one.4-30 Copyright© 1995-2017 SAMSUNG. All rights reserved.