Service and Repair Manual October 2019Control System Fault Codes122 S® -80 XC ™ • S® -85 XC ™ • S®-80 HF • S®-85 HF Part No. 1280490GTID Component ID Name Cause Effect Solution78 PlatformController(PCON)13 NotdetectedTCON has notdetected the PCONprimary processoron thecommunicationsbus.Controls from theplatform will notoperate.* Verify PCON is receiving power.Check for 12 V on J15-2 (+) and J15-1(-).* Verify PCON is receiving ESTOPsignals. With ground ESTOP pulledout and keyswitch set to Platform,verify 12 V is reaching PCON J15-10.* Verify CAN bus is functional. Pull outconnector J15 from the PCON andwith a voltmeter set to resistanceverify that pins 3 and 4 on the harnessconnector measure between 110 and130 Ohms. Check wiring and boomcable for open or short circuits ifresistance check fails.* Replace PCON if necessary.29 SoftwareversionmismatchPCON software isout of date.Machine limited torecovery functionsDownload latest software fromfirmware site and update machine.79 DisplayController(DISCON)13 NotdetectedTCON has notdetected theDISCON on thecommunicationsbus.Controls from theground will notoperate.* Verify DISCON is operating bychecking that the display on the frontis operating properly.* If there is no display, try to power upthe DISCON by setting the keyswitchto Ground, pull out the ground ESTOPand press the Ground FunctionEnable button. The display shouldstart.* If there is still no display, checkDISCON power on J10 pins 2 (+) and1 (-).* If DISCON operates but faultpersists, check the CAN bus wiring.Disconnect J10 and with a voltmeterset to resistance verify that theresistance between pins 3 and 4 onthe harness connector are between55 and 65 ohms. Check CAN wiring ifresistance check fails.* Replace DISCON if required.29 SoftwareversionmismatchDISCON softwareis out of date.Machine limited torecovery functionsDownload latest software fromfirmware site and update machine.
