Service Manual February 2017Control System Fault Codes148 S-80 • S-85 • S-80X Part No. 1259369GTHow to R etrieve Contr ol Sy stem F ault CodesControl SystemHow to Retrieve Control SystemFault CodesAt least one fault code is present when the alarm atthe platform controls produces two short beepsevery 30 seconds for 10 minutes.Perform this procedure with the engine off, the keyswitch turned to platform controls and the redEmergency Stop button pulled out to the onposition at both the ground and platform controls.1 Open the platform control box lid.Electrocution/burn hazard.Contact with electrically chargedcircuits could result in death orserious injury. Remove all rings,watches and other jewelry.2 Locate the red and yellow fault LEDs on theALC-500 circuit board inside the platformcontrol box. Do not touch the circuit board.Component damage hazard.Electrostatic discharge (ESD)can damage printed circuit boardcomponents. Maintain firmcontact with a metal part of themachine that is grounded at alltimes when handling printedcircuit boards OR use agrounded wrist strap.3 Determine the error source: The red LEDindicates the error source and will flash twoseparate codes. The first code will indicate thefirst digit of the two digit code, flashing onceper second. It will then pause for 1.5 secondsand flash the second digit once per 0.5second.Note: When the red LED is flashing the code, theyellow LED will be on solid.4 Determine the error type: The yellow LEDindicates the error type and will flash twoseparate codes. The first code will indicate thefirst digit of the two digit code, flashing onceper second. It will then pause for 1.5 secondsand flash the second digit once per 0.5second.Note: When the yellow LED is flashing the code,the red LED will be on solid.5 Use the fault code table on the following pagesto aid in troubleshooting the machine bypinpointing the area or component affected.
