TM 10-4610-232-34
Table 2-1. Direct Support Troubleshooting Guide (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 10. Check the backwash pump connector, P45, and cable for damage. If no damage is found, replace the
backwash chlorine pump (para. 4-37 of TM 10-4610-232-12).
Step 11. Check for continuity and shorts from P16D to J45A and from P16E to J45B.
Replace/repair the connectors as necessary (para. 2-18).
Step 12. Shut down ROWPU and generator. Refer to electrical drawings in Appendix D and remove wire #2A from
K13. Remove connector P16 from the side of the control panel. Check continuity, point-to-point, from CB9
(REF: Interconnection diagram FO-2, Sheet 8) (wire #284) to relay K13(K1). (Schematic line 721). Depress the
indicating plunger on relay K11 when testing its contact. Check continuity, point-to-point, from transformer
T1(X2) (REF: Interconnection diagram FO-2, Sheet 10) to relay K13 (wire #2A).
(a) Repair any loose or damaged wire (para. 2-20).
(b) Replace relay K11 if its contact does not close when the indicating plunger is depressed (para. 2-23).
(c) Replace timer TDK3 (REF: Interconnection diagram FO-2, Sheet 8) if its terminals (9-10) do not show
continuity (para. 2-23).
(d) Replace relay K13 if the above checks do not locate the problem (para. 2-23).
Step 13. Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove connector PI 6 from
the side of the control panel. Check continuity, point-to-point, from CB9 (wire #264) to J16N. (Schematic
lines 721 -728.) Depress the indicating plunger on relay K11 when testing its contact. Check continuity,
point-to-point, from transformer T1(X2) to J16P.
(a) Repair any loose or damaged wire (para. 2-20).
(b) Replace relay K11 if its contact does not close when the indicating plunger is depressed (para. 2-23).
(c) Replace timer TDK2 if its terminals (9-10) do not show continuity (para. 2-23).
(d) Replace/repair J16 if faulty (para. 2-23).
Step 14. Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove connector P16 from
the side of the control panel. Check continuity, point-to-point, from CB9 (wire #264) to J16D. (Schematic line
730,) Depress the indicating plunger on relay K13 when testing its contact. Check continuity, point-to-point,
from transformer T1(X2) to J16E.
(a) Repair any loose or damaged wire (para. 2-20).
(b) Replace relay K13 if its contact does not close when the indicating plunger is depressed (para. 2-23).
(c) Replace/repair J16 if faulty (para. 2-21).
Step 15. Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove connector PI 6 from
the side of the control panel and the wires from terminal 2 of TDK2. Check continuity, point-to-point, from
CB9 (wire #264) to TDK2 (terminal 1), (Schematic line 722.) Depress the indicating plunger on relay K11
when testing its contact. Check continuity, point-to-point, from transformer T1(X2) to TDK2 (wire #2A).
(a) Repair any loose or damaged wire (para. 2-20).
(b) Replace relay K11 if its contact does not close when the indicating plunger is depressed (para. 2-23).
Step 16. Check continuity from TDK2 (terminal 1) to TDK2 (terminal 8).
(a) Repair any loose or damaged wires (para. 2-20).
(b) Replace TDK2 if the check in steps 15-16 have not isolated the problem (para. 2-23).
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