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Direct Support Troubleshooting Guide (Continued) - TM-10-4610-232-34_63
Direct Support Troubleshooting Guide (Continued) - TM-10-4610-232-34_65

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 NOTE When checking continuity in the power circuits it is important to watch the wire numbers on each phase. Each wire is tagged identically on both ends, but in some instances, a #1 phase wire will enter the top of a starter or circuit breaker and come out the bottom of the same device as a #2 phase wire. This is done to change the rotation of a motor so that its associated pump will turn in the correct direction. Any two wires may be interchanged to accomplish  this  rotational  change. (a)  Repair  any  loose  or  damaged  wire  (para.  2-20). (b)  Replace  circuit  breaker  CB4  (REF:  Interconnection  diagram  FO-2,  Sheet  10)  if  open  on  any  phase (para. 2-25). (c)  If  MS3  shows  open  on  any  phase,  replace/repair  it  (para.  2-25). (d)  Replace/repair  J21  if  faulty  (para.  2-21). Step 13. Shut down ROWPU and generator. Disconnect the cable from the ROWPU to the generator at the generator end.  Check  continuity,  point-to-point,  from  the  generator  end  of  the  cable  to  the  power  distribution  block (PDB) on each phase. (a)  Replace  the  main  power  cable  if  open  on  any  phase  (para.  2-18). (b)  Replace  circuit  breaker  CB1  (REF  Interconnection  diagram  FO-2,  Sheet  10)  if  open  (para.  2-25). (c)  Repair  any  loose  or  damaged  wires  (para.  2-20). (d)  If  the  above  checks  have  not  revealed  the  problem,  refer  to  generator  troubleshooting. 2. Raw water pump overload heaters burned out. (Ref. Schematic diagram FO-1, sheet 5, schematic lines 532-537). Check  each  lead,  2T1,  3T2  and  3T3  from  the  outlet  side  of  MS3  (REF:  Interconnection  diagram  FO-2,  Sheet  10)  to connector  J21  (REF:  Interconnection  diagram  FO-2,  Sheet  16)  for  tightness  and  damage. (a)  Repair  any  loose  or  damaged  wire  (para.  2-20). (b)  Repair  the  terminal  strip  if  damaged  (para.  2-23). (c)  Repair  connector  J21  if  damaged  (para.  2-21). (d)  Replace  the  MS3  overload  heaters  (para.  2-23). 3. Raw water pump starts but stops when start button is released. (Ref. schematic diagram FO-1, sheet 6, schematic lines 619-620). Step 1. Shut down the ROWPU. Open the control panel. Refer to the operator’s manual and restart the unit. Look at the indicating plunger on relay K1 (REF: interconnection diagram FO-2, Sheet 6). It should be in. If it is out, refer  to  operation  mode  circuit  troubleshooting. Step 2.  Shutdown  ROWPU  and  generator.  Refer  to  electrical  drawings  in  Appendix  D.  Check  continuity,  point-to- point,  from  PB7(1A4)  to  PB7(1A3)  (REF:  Interconnection  diagram  FO-2,  Sheet  11)  and  K12(A1Y)  (REF: Interconnection   diagram   FO-2,   Sheet   6).   Depress   the   indicating   plunger   of   MS3   (REF:   Interconnection diagram  FO-2,  Sheet  10)  and  K1  when  checking  continuity  across  their  contacts. (a)  Repair  any  loose  or  damaged  wire  (para.  2-20). (b)  Replace  relay  K1  if  its  contact  does  not  show  continuity  when  the  indicating  plunger  is  depressed (para.  2-23), (c)  Replace/repair  MS3  if  its  contact  does  not  show  continuity  (para.  2-25). 4. Raw water pump motor hums but will not turn. (Ref. Schematic diagram FO-1, sheet 5, schematic lines 532-533). Step  1.  Check   with   operator. (a)  If  other  motors  do  not  operate,  go  to  step  2. (b)  If  other  motors  operate  okay,  go  to  step  3. Step 2. Shutdown  ROWPU  and  generator.  Disconnect  the  cable  from  the  ROWPU  to  the  generator  at  the  generator end.  Check  continuity,  point-to-point,  from  the  generator  end  of  the  cable  to  the  power  distribution  block (PDB) on each phase. (a)  Replace  the  main  power  cable  if  open  on  any  phase  (para.  2-18). (b)  Replace  circuit  breaker  CB1  (REF:  Interconnection  diagram  FO-2,  Sheet  10)  if  open  (para.  2-25). Change 1 2-43







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