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Direct Support Troubleshooting Guide (Continued) - TM-10-4610-232-34_66
Direct Support Troubleshooting Guide (Continued) - TM-10-4610-232-34_68

TM-10-4610-232-34 Water Purification Unit Reverse Osmosis 3 000 GPH Trailer Mounted Flatbed Cargo 22-1/2 Ton 8 Wheel Tandem Model No. WTA-060 Manual
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TM 10-4610-232-34 Table  2-1.  Direct  Support  Troubleshooting  Guide  (Continued) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE   ACTION 9. Raw water pump runs but Iight does not come on. Light test okay. (Ref. Schematic diagram FO-1, sheet 1, schematic line 163). Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove the #2B wire from PL8 (REF: Interconnection  diagram  FO-2,  Sheet  11).  Remove  the  #231  wire  from  MS3  (REF:  Interconnection  diagram  FO-2, Sheet  10).  Check  continuity,  point-to-point,  from  K12(A1X)  (REF:  Interconnection  diagram  FO-2,  Sheet  6)  to  PL8 (wire  #269).  Check  continuity  from  T1(X2)  (REF:  Interconnection  diagram  FO-2,  Sheet  10)  to  PL8  (wire  #2  B). (a)  Repair  any  loose  or  damaged  wire  (para.  2-20). (b)  Replace  LTK1  (REF:  Interconnection  diagram  FO-2,  Sheet  7)  if  its  contact  is  open  (para.  2-23). (c)  Replace  PL8  if  all  the  continuity  checks  are  okay  (para.  2-22). 10. Raw water pump motor starter (MS3) does not pull In (Ref. Schematic diagram FO-1, sheet 6, schematic lines 619-621, control circuits; schematic diagram FO-1, sheet 5, schematic 532-534, power circuits). Shut down ROWPU and generator. Remove the motor starter coil wires. Use a multimeter and check resistance across the  coil  connections.  It  should  be  near  zero. Replace  the  coil  if  resistance  is  infinity  (open)  or  shorted  (para.  2-25). 11. Raw water pump motor starter (MS3) pulls in but does not run. (Ref. Schematic diagram FO-1, sheet 6, schematic lines 619-621, control circuits; sheet 5, schematic lines 532-534, power circuits). Step 1. Shutdown  ROWPU  and  generator.  Turn  circuit  breaker  CB4  (REF:  Interconnection  diagram  FO-2,  Sheet  10) off  and  disconnect  connector  P21  (REF:  Interconnection  diagram  FO-2,  Sheet  16)  from  the  control  panel. Use  a  multimeter  and  check  continuity  across  each  pair  of  motor  control  contractors.  Manually  engage  the starter  contacts  during  testing.  The  reading  should  be  zero. Replace  the  motor  starter  contactor  if  any  pair  is  open  (para.  2-25). Step 2.  Remove  the  contactor  block  from  the  starter  and  check  for  burned,  arced  over  contacts. Replace  the  motor  starter  contactor  if  they  are  damaged  (para.  2-25). 12. Raw water pump motor starter auxiliary contact does not operate correctly. (Ref. Schematic diagram FO-1, sheet 6, schematic line 620 and sheet 11, schematic line 1107). Shut  down  ROWPU  and  generator.  Refer  to  the  electrical  drawings  in  Appendix  D.  Remove  the  wires  from  the auxiliary  contact.  Use  a  multimeter  and  check  for  correct  operation  when  the  starter  contacts  are  manually  engaged and when they are open, (a)  If  the  hold-in  contact  (line  620)  does  not  operate  correctly,  replace  the  starter  (para.  2-25). (b) If the control contact (line 11 07) does not operate correctly, replace the auxiliary contact block (para. 2-25). CIRCUIT BREAKERS 440 VAC. A circuit breaker will not reset. NOTE This  procedure  does  not  apply  to  the  distribution  or  raw  water  pump  circuit  breakers. Refer  to  individual  troubleshooting  for  those  breakers. Shut  down  ROWPU  and  reset  the  circuit  breaker. (a)  Replace  the  circuit  breaker  if  it  does  not  stay  set  (para.  2-24). (b)  Refer  to  individual  circuit  troubleshooting  for  the  breaker  if  it  stays  set  with  no  power  on  the  system. 2-46 Change 1







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