TM 10-4610-232-34Table 2-1. Direct Support Troubleshooting Guide (Continued)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION19. Clean/flush tank valve light does not work. Light test okay. Clean/flush tank valve light does not show actual valveposition. (Ref. Schematic diagram FO-1, sheet 7, schematic line 736).Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove the #2A wire from PL18 (REF:Interconnection diagram FO-2, Sheet 12). Check continuity, point-to-point, from CB9 (REF: Interconnection diagramFO-2, Sheet 8) to wire #307 on PL18.(a) Repair any loose or damaged wire (para. 2-20).(b) Replace/repair J15 (REF: Interconnection diagram FO-2, Sheet 9) if faulty (para. 2-21).(c) Replace/repair P15 (REF: Interconnection diagram FO-2, Sheet 7) or J33 (REF: Interconnectiondiagram FO-2, Sheet 14) if faulty (para. 2-7).(d) Replace LTK3 (REF: Interconnection diagram FO-2, Sheet 7) if its contact is open (para. 2-23).20. Media filter flush valve light does not work. Light test okay. Media filter flush valve lightdoes not show the actual valveposition. (Ref. schematic diagram FO-1, sheet 7, schematic line 707).Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove the #2A wire from PL2 (REF:Interconnection diagram FO-2, Sheet 11). Check continuity, point-to-point, from CB9 (REF: Interconnection diagramFO-2, Sheet 8) to wire #272 on PL12 (REF: Interconnection diagram FO-2, Sheet 12).(a) Repair any loose or damaged wire (para. 2-20).(b) Replace/repair J14 (REF: Interconnection diagram FO-2, Sheet 9) if faulty (para. 2-21).(c) Replace/repair P14 or J48 (REF: Interconnection diagram FO-2, Sheet 15) if faulty (para. 2-7).(d) Replace LTK2 (REF: Interconnection diagram FO-2, Sheet 7) if its contact is open (para. 2-23).21. Media filter flush valve will not open in filter backwash or when the flush valve switch is pushed. Pilot light off. (Ref.Schematic diagram FO-1, sheet 7, schematic lines 706-707).Refer to media filter backwash phase 1 circuit troubleshooting.22. Media filter flush valve will not close in filter backwash or when the flush valve switch is pushed. Pilot light on. (Ref.Schematic diagram FO-1, sheet 7, schematic line 708).Step 1. Check valve for actual position.If valve is closed, refer to valve light does not show correct valve position troubleshooting (malfunction 20).Step 2. Shut down ROWPU and generator, Refer to electrical drawings in Appendix D. Check continuity, point-to-point, from transformer T1(X2) (REF: Interconnection diagram FO-2, Sheet 10) to J14D (REF: interconnectiondiagram FO-2, Sheet 9).(a) Repair any loose or damaged wire (para. 2-20).(b) Replace/repair connector J14 if faulty (para. 2-21).(c) Refer to media filter backwash phase 1 circuit troubleshooting if the above checks have not isolatedthe problem.AIR BLOWDOWN SOLENOID.Air blowdown solenoid valve does not work. (Ref. Schematic diagram FO-1, sheet 8, schematic lines 826-827).NOTEIf unit maintenance troubleshooting indicates that the control panel portion of the airblowdown solenoid circuits is okay, start troubleshooting at step 3.Step 1. Shut down ROWPU and generator. Refer to electrical drawings in Appendix D. Remove the #2A wire fromTDK1 (REF: Interconnection diagram FO-2, Sheet 8) and disconnect the P13 (REF: interconnection diagramFO-2, Sheet 14) connector on the control panel. Check continuity from terminal 1-23 to relay TDK1 (terminal11) and to TDK1 (terminal 4). Also, check continuity from transformer T1(X2) (REF: Interconnection diagramFO-2, Sheet 10) to TDK1 (wire #2A) and to connector J13U (REF: interconnection diagram FO-2, Sheet 9).(a) Repair any loose or damaged wire (para. 2-20).(b) Replace/repair connector J13 if faulty (para. 2-21).Change 12-39
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
