5 - 2 S-80 • S-85 • S-80X Part No. 122985February 2011Section 5 • Fault CodesFAULT CODESFault Codes - Control SystemHow to Retrieve ControlSystem Fault CodesNote: At least one fault code is present when thealarm at the platform controls produces two shortbeeps every 30 seconds for 10 minutes.Note: Perform this procedure with the engineoff, the key switch turned to platform controlsand both red Emergency Stop button pulled outto the on position at both the ground andplatform 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 circuitboard components. If the circuitboard does need to be handled,maintain firm contact with ametal part of the machine that isgrounded at all times whenhandling the printed circuit boardOR use a grounded wrist strap.3 Determine the error source: The red LEDindidates the error source and will flash twoseparate codes. The first code will indicatethe first digit of the two digit code, flashingonce per second. It will then pause for 1.5seconds and flash the second digit once per0.5 second.Note: When the red LED is flashing the code, theyellow LED will be on solid.4 Determine the error type: The yellow LEDindidates the error type and will flash twoseparate codes. The first code will indicatethe first digit of the two digit code, flashingonce per second. It will then pause for 1.5seconds and flash the second digit once per0.5 second.Note: When the yellow LED is flashing the code,the red LED will be on solid.5 Use the fault code table on the followingpages to aid in troubleshooting the machineby pinpointing the area or componentaffected.
