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Troubleshooting
Program Alteration

TM-5-3895-374-24-1 Paving Machine Bituminous Material: Crawler Mounted Diesel Engine Driven Manual
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TM 5-3895-374-24-1 Chapter 9 Troubleshooting Tips for Troubleshooting Your When troubleshooting, pay careful attention to these general warnings Control System ATTENTION: Have all personnel remain clear of the controller and equipment when power is applied The problem may be intermittent and sudden unexpected machine motor could result m injury Have someone ready to operate an emergency-stop switch in case it becomes necessary to shut off power to the controller equipment. Also, see NFPA 70E Part II for additional guidelines for safety related work practices. Never reach into a machine to actuate a switch since unexpected machine motion can occur and cause injury. Remove all electrical power at the main power disconnect switches before checking electrical connections or inputs/outputs causing machine motion. If  installation  and  start-up  procedures  detailed  in  chapters  5,  6,  and  7  were  followed closely,  your  SLC  controller  will  give  you  reliable  service  If  a  problem  should  occur,  the first step in the troubleshooting procedure is to identify the problem and its source. The  SLC  500  controller  has  been  designed  to  simplify  troubleshooting  procedures  By observing  the  diagnostic  indicators  on  the  front  of  the  power  supply,  processor  unit  and I/O modules, the majority of faults can be located and corrected These indicators, along with  error  codes  Identified  in  the  programming  device  user  manual  and  programmer’s monitor, help trace the source of the fault to the user’s input/output devices, wiring, or the controller. Removing Power Before  working  on  a  SLC  500  modular  system,  always  remove  the  power  supply  input power at the main power disconnect switch. The  power  LED  on  the  power  supply  indicates  that  DC  power  Is  being  supplied  to  the chassis. The LED could be off when incoming power is present. (page 3-435)







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