94Service Manual – SC401, SCRUBTEC 34420 - Wheel System, TractionDrive Wheels Controller (EB3) AlarmsFigure 5:Diagnostic LEDDisplay ofDrive wheelscontroller(EB3)diagnosticLEDMeaning Conditions What to do ResetExample of 3 blinking:3 flashes Speed adjuster(RV1) faultSignal input out of range Check Speed adjuster(RV1) connections andfunctionsTurn off the machine usingthe Ignition key (KEY)5 flashes Overtemperature Excessive Drive wheelscontroller internal temperatureCheck if there is debris ordamages preventing thedrive system operationTurn off the machine usingthe Ignition key (KEY)and wait a few minutes forthe system to cool downbefore turning it back on6 flashes Inner power sectionfaultShort-circuit in powerMOSFET upon Drive wheelscontroller startCheck if there are anyshort-circuits in the Drivemotor wiring (M4). Try toreset the machine, if thealarm persists, replace theDrive wheels controller(EB3)Turn off the machine usingthe Ignition key (KEY)7 flashes Short-circuitovercurrentOvercurrent detected on theoutput circuit (Drive motor)due to a short-circuitCheck the Drive motor(M4) wiring and functions.Turn off the machine usingthe Ignition key (KEY)
