TM 55-1930-209-14&P-2 Table 4-3.  Seawater System Troubleshooting (Cont'd) Problem Probable Cause Suggested Action c. Seawater pressure regulator closed c. Open pressure regulator to 10 psi d. Seawater pump 1 or 2 malfunctioning d. Troubleshoot (Table 4-1) e. In-line filter clogged e. Replace filter (paragraph 4-7.2.11) 7. Seawater not being supplied to chlorination system  through  the  cooling pump a. Valve SW47 closed a. Open valve SW47 b. Seawater strainer clogged b. Switch    to    alternate    strainer    and    clean clogged strainer (paragraph 4-7.2.3) c. Seawater pressure regulator closed c. Open pressure regulator to 10 psi d. Air     conditioning     cooling     pump malfunctioning d. Troubleshoot (Table 4-1) e. Valve(s) SW3 and/or SW27 closed e. Open valve(s) SW3 and/or SW27 f. In-line filter clogged f. Replace filter (paragraph 4-7.2.11) g. Piping clogged g. Unclog piping 8. Seawater not being supplied  to  air  conditioning unit from cooling pump a. Valve SW28 closed a. Open valve SW28 b. Cooling pump malfunctioning b. Troubleshoot (Table 4-1) c.     Seawater strainer clogged c.     Switch    to    alternate    strainer    and    clean clogged strainer (paragraph 4-1.3) d. Valve(s) SW3 and/or SW27 closed d. Open valve(s) SW3 and/or SW27 e. Piping clogged e. Unclog piping 9. Seawater not being supplied to ballast tank a. Seawater   not   getting   to   ballast tank supply valve SW29 a. Troubleshoot    seawater    supply    lines    as given in problem 5, a thru e b. Piping clogged b. Unclog piping 4-6