TM5-4220-231-14&PTROUBLESHOOTING- (Con't)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION7. LOSS OF AIR PRESSURE (VTA).Step 1. Check that the volume tank drain valve is closed.Close drain valve.Step 2. Inspect safety relief valve for leaks.Replace faulty relief valve.8. EXCESSIVE AIR PRESSURE IN VOLUME TANK (VTA),Step 1. Check regulator setting on DACC.Adjust regulator for correct VTA pressure.Step 2. Ensure relief valve is adjusted properly and is not jammed in closed position.Replace faulty relief valve.9. PRESSURE GAGE NEEDLE INDICATOR IS NOT SET TO O PSI.Ensure SDASS system is shutdown.Bleed SDASS and open gage isolation valves.Check to ensure needle indicator is set to O psi.Adjust gage by inserting zero adjust tool into set hole on the gage face plate lens.Turn the face plate with the zero adjust tool until the needle indicator is aligned withthe 0 psi reading on the face plate.If the face plate will not adjust to 0 psi, replace gage.10. DEPTH GAGE NEEDLE INDICATOR IS NOT SET TO 0.Check to ensure that SDASS system is shut down.Bleed SDASS and open gage isolation valve.If needle indicator is not set to 0:Adjust depth gage face plate by inserting screw driver into set screw on face platelens. Turn set screw until needle indicator and 0 onface plate are aligned.If needle indicator and 0 indicator on face plate will not align, replace gage.3-15
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