VERIFICATION PROCEDURE (cont) - TM-55-1930-209-14P-9-4

VERIFICATION PROCEDURE (cont) - TM-55-1930-209-14P-9-4_105

VERIFICATION PROCEDURE (cont) - TM-55-1930-209-14P-9-4_107

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
Page Navigation
83

TROUBLESHOOTING TESTING AND ADJUSTING POSSIBLE CAUSES VERIFICATION PROCEDURE (Continued) If all checks show continuity, remove the leads from the cathode of CR9 and from the anode of CR10. Check continuity from spade terminal (11) to spade terminal (19). Also check continuity between spade terminal (6) and spade terminal (8). If continuity is shown in either test, the module (A2) has an inside short circuit. Make a replacement of the module as necessary. 16 Regulator Module (A1) Has a Test procedures for this component are in the section on Defect REGULATOR MODULE. 17. Shorted Suppression Diode Surge suppression diode (CR7) is installed on positive heat sink (CR7 or CR8) (E1) and has a positive stud-type terminal. Surge suppression diode (CR8) is installed on negative heat sink (E2) and has a negative stud-type terminal. Disconnect (CR7 and CR8) by removing the wire to the spade terminal of each diode. Check the forward and reverse resistance of each diode. Typical resistance in both directions will be 15,000 ohms or more. NOTE: A suppression diode failure can normally be found visually or by the odor of selinium that has become too hot. 18. Shorted Surge Suppression Disconnect surge suppression diode (CR11) by removing wire (6) Diode (CR11) and both wires (19) connected to its spade terminals. Check the resistance of (CR11) with an ohmmeter connected to the spade terminals. Resistance must be 15,000 ohms or more. NOTE: A failure of the suppression diode can normally be found visually or by the odor of selinium that has become too hot. 19. Open Suppression Reactor (L1) Disconnect suppression reactor (L1) by removing wire (26) from terminal (26). Check continuity from wire (26), through suppression reactor (L1) to wire (12) at suppression capacitor (C2). Resistance is zero. 20. Open SCR Reactor (L2) Disconnect SCR reactor (L2) by removing wire (19) from spade terminal (19) of rectifier module (A2). Check continuity from wire (19), through SCR reactor (L2) to wire (12) at suppression capacitor (C2). NOTE: Suppression reactor (L2) is several turns of wire with an air core. Resistance is zero. 21. Shorted Suppression Capacitor Disconnect suppression capacitor (C2) by removing wire (6) from (C2) the spade terminal on the capacitor. Ohmmeter scale must be on RX1000. Check continuity of (C2) from the spade terminal from which wire (6) was removed to the spade terminal that wires (12) are connected. When the ohmmeter test cables are first connected to the capacitor, a low resistance will be seen. As a charge from the ohmmeter is put on the capacitor, there will be an increase in resistance until a constant indication is seen. 22. Shorted RFI Capacitor (C1) Disconnect the RFI suppression capacitor (C1) by removing both wires (6) from the spade terminal on the capacitor. Ohmmeter scale set to RX1000. Check continuity of the suppression capacitor (C1) from the spade terminal from which wires (6) were (Continued on next page) 66

Privacy Statement
Press Release
Contact