78 Phaser 2135 Color PrinterTroubleshootingCustomer Replaceable Consumables (CRCs)Expended consumables (toner cartridges, imaging drums, fuser, transfer belt) will preventprinting. Maintain a supply of consumables (especially toner cartridges). Replace consumables when prompted by the printerNoteSpecific instructions for replacing each consumable are included with theindividual replacement packages.Front Panel MessagesYour printer displays messages on the front panel when operator intervention is required.The two-line display of the front panel provides information about the condition of theprinter and the suggested or required course of action.There are two types of messages that require action: Fault messages appear when the printer stops due to a malfunction, such as a paperjam. Action must be taken to resolve the fault. Attention messages do not stop the printer, but warn of action that should be taken toavert a shutdown.The following table lists fault and attention messages in alphabetical order, along with anexplanation and corrective action.Front Panel MessagesMessage Type Explanation/Corrective ActionCheck Tray[Check Tray 1][Check Tray 2][Check Tray 3][Check Tray 4][Check Tray 5]No Tray PresentFault The specified tray is not installed. Make sure thetray is fully inserted.Control Panel Error U15Power Off/OnFault An error has been detected with the front panelinterface and communication path. Turn off theprinter, wait 15 seconds, then turn on the printer. Ifthe problem persists, check the support links at:www.xerox.com/officeprinting/infoSMART.Engine PU Fan Error U8Power Off/OnFault An error has been detected with a cooling fan. Turnoff the printer, wait 15 seconds, then turn on theprinter. If the problem persists, check the supportlinks at:www.xerox.com/officeprinting/infoSMART.