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Page Title: Section V TROUBLESHOOTING
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TM  5-4120-377-14 Section   V   TROUBLESHOOTING 4-16.   GENERAL a.   This   section   contains   troubleshooting   information   for   locating   and   correcting   most   of   the   operating troubles  which  may  develop  in  the  air  conditioner  unit.  Each  malfunction  for  an  individual  component,  unit,  or system  is  followed  by  a  list  of  tests  or  inspections  which  will  help  you  to  determine  corrective  actions  to  take. You  should  perform  the  tests/insections  and  corrective  actions  in  the  order  listed. b.   This   Manual   cannot   list   all   malfunctions   that   may   occur,   nor   all   tests   or   inspections   and   corrective actions.  If  a  malfunction  is  not  listed,  or  is  not  corrected  by  listed  corrective  actions,  notify  your  supervisor. c.  Table  4-2  lists  the  common  malfunctions  which  you  may  find  during  the  operation  or  maintenance  of  the air  conditioner  unit  or  its  components.  You  should  perform  the  tests/inspections  and  corrective  actions  in  the order  listed. NOTE Before  you  use  this  table,  be  sure  you  have  performed  all  applicable  operating  checks. HIGH  VOLTAGE is used in operation of this equipment. DEATH ON CONTACT may result if personnel fail to observe safety precautions. Never work on electrical equipment unless there is another person nearby who is familiar with  operation  and  hazards  of  equipment  and  who  is  competent  in  administering  first  aid. When  technician  is  aided  by  operators,  he  must  warn  them  about  dangerous  areas. Whenever possible, input power supply to equipment must be shut off before beginning work. Take  particular  care  to  ground  every  capacitor  likely  to  hold  a  dangerous  charge.  When working inside, after power has been turned off, always ground every part before touching it. Be careful not to contact high-voltage connections of 203 volts ac input when installing or operating  this  equipment. Whenever nature of opration permits, keep one hand away from equipment to reduce hazard of  current  flowing  through  vital  organs  of  body. Do not operate equipment without all grilles, guards, louvers, and covers in place and tightly secured. Warning:   Do   not   be   misled   by   term   “low   voltage.”  Potentials  as  low  as  50  volts  may cause   death   under   adverse   conditions. 4-39

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