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Direct Support Troubleshooting Guide (Continued) - TM-10-4610-232-34_72
Direct Support Troubleshooting Guide (Continued) - TM-10-4610-232-34_74

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 8. Step 17.  Check resistance across the K10 coil (K1-K2). It should be close to zero. (a)  If  the  resistance  is  infinity  or  if  it  is  zero,  replace  relay  K10  (para.  2-23). (b)  If  the  resistance  check  on  K10  is  okay,  replace  relay  LK1  (para.  2-23). (c)  Return  the  ROWPU  to  service  and  check  operation  of  phase  1. Step 18.  Shut  down  ROWPU  and  generator.  Refer  to  electrical  drawings  in  Appendix  D  and  remove  wire  #2A  from K11. Check continuity, point-to-point, from CB9 (wire #264) to relay K10(A1X). (Schematic line 704.) Depress the  indicating  plunger  on  relay  K2  during  the  test  of  its  contact. (a)  Repair  any  loose  or  damaged  wire  (para.  2-20). (b)  Replace  relay  K2  if  its  contact  is  closed  when  the  indicator  plunger  is  out  or  if  it  is  open  when  the plunger is in (para. 2-23). (c)  Replace  relay  K15  if  its  contact  is  open  (para.  2-23). (d)  Replace  pressure  switch  PSL8  if  it  is  open  (para.  2-20). Step  19.   Check   continuity,   point-to-point,   from   relay   K10(A1X)   to   relay   K11(K1).   Repeat   the   procedure   from transformer  T1(X2)  to  relay  K11  (wire  #2A).  Depress  the  indicating  plunger  on  relays  K10  and  K2  when checking  their  individual  contacts.  Remove  wire  #268  from  PB16  before  testing. (a)  Repair  any  loose  or  damaged  wire  (para.  2-20). (b)  Replace  relay  K10  if  its  contact  is  closed  when  the  indicator  plunger  is  out  or  if  it  is  open  when  the plunger is in (para. 2-23). (c)  Replace  relay  K2  if  its  contact  is  closed  when  the  indicator  plunger  is  out  or  if  it  is  open  when  the plunger is in (para. 2-23). (d) Replace relay K11 if all the checks in steps 18-19 are okay (para. 2-23). Backwash cycle phase 2. (Ref. Schematic diagram FO-1. sheet 7, schematic lines 721-729) (TDK2 setting 1 minute 36 seconds). Step 1.  Shutdown  the  ROWPU.  Open  the  control  panel.  Restore  power  to  the  control  panel,  Turn  off  the  raw  water pump  circuit  breaker  CB4  and  the  boost  pump  circuit  breaker  CB5  (REF:  Interconnection  diagram  FO-2, Sheet  10).  Disconnect  the  backwash  chlorine  pump,  connector  J45  (REF:  Interconnection  diagram  FO-2, Sheet 15). Set the control panel up in system “BACKWASH” and push “INITIATE”. Check that the indicating plunger  on  relay  K11  (REF:  Interconnection  diagram  FO-2,  Sheet  6)  goes  in  at  the  end  of  phase  1  of  the backwash  cycle. If  the  plunger  on  K11  is  not  in,  refer  to  backwash  circuit  phase  1  troubleshooting. Step 2.  Check  that  the  inner  pointer  on  time  TDK2  (REF:  Interconnection  diagram  FO-2,  Sheet  8)  is  moving  toward zero. If it is not moving, go to step 15. Step 3. Remove connector J46 (REF: Interconnection diagram FO-2, Sheet 15) from the backwash air solenoid valve. Check for 110-120 VAC across J46A and J46B. If voltage is not present, go to step 5. Step 4.  Check  P46  (REF:  Interconnection  diagram  FO-2,  Sheet  15)  and  the  cable  for  damage. (a)  Replace/repair  connector  P46  if  damaged  (para.  2-18). (b) Replace the backwash air solenoid valve SV6 (REF: Interconnection diagram FO-2, Sheet 15) if there is no connector damage (para. 4-51 of TM 10-4610-232-12). Step 5.  Remove  connector  P16  (REF:  Interconnection  diagram  FO-2,  Sheet  15)  from  the  control  panel.  Check  for 110-120 VAC across J16N and J16P (REF: Interconnection diagram FO-2, Sheet 9). If voltage is not present, go to step 13. Step 6.  Check  for  continuity  and  shorts  from  P16N  to  J46A  and  from  P16P  to  J46B. Replace/repair  the  connectors  and  cable  as  necessary  (para.  2-18). Step 7.  Check  that  the  indicating  plunger  on  K13  (REF:  Interconnection  diagram  FO-2,  Sheet  6)  is  in. If the plunger is out, go to step 12. Step 8. Check  for  110-120  VAC  across  J16D  and  J16E. If voltage is not present, go to step 14. Step 9.  Reconnect  J/P16  and  check  for  110-120  VAC  at  the  chlorine  backwash  pump  connector  J45A  and  J45B. If voltage is not present, go to step 11. 2-52 Change 1







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