TM 5-4220-231-14&P TROUBLESHOOTING -  (Con't) MALFUNCTION TEST INSPECTION CORRECTIVE ACTION Step 4. Check the primary HP   IN  valve to   ensure it  is  open. Open primary HP    IN  valve. Step 5. Open Primary HP   Regulator 1/4   turn    and read LP   OUT   gage. If  LP   OUT   gage still  indicates below normal operating pressure, open secondary HP   IN  valve and    open the Secondary HP Regulator 1/4   turn. If  LP   OUT    gage registers correct pressure, the problem is   in  the primary circuit of   the    CRS. Either the HP   IN  valve is  faulty    or   the regulator is  faulty. Request intermediate direct support. If  LP   OUT    gage still   reads below normal, observe LP   OUT    gage on    recompression chamber. If  pressure reaches the    chamber but   does not   register on   the    CRS LP   OUT    gage, the    CRS LP   OUT    gage is  faulty. Replace the    CRS LP   OUT    gage. If pressure does not   reach the    chamber, and the    LP   OUT    gage on   the    CRS does not   register pressure, problems may    exist in   both primary and secondary circuit of  the CRS. Either the Primary and Secondary HP   IN  valves are    faulty, or   the regulators are faulty. Request intermediate direct support. 5. PRESSURE GAGE IS   LEAKING. Visually inspect gage to   confirm that    the    gage, not   the    connections are leaking. Replace gage. 6. SUPPLY VALVE INOPERATIVE. Step 1. Cycle valve open and closed. Step 2. Note    if the valve    stem is  turning with   the handle. If handle is   loose on   valve stem, tighten handle securing screw. If valve stem is  stripped, or  cycling does not   correct the   problem, request intermediate direct support. 3-14