TM5-4220-231-14&P
TROUBLESHOOTING- (Con't)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE
ACTION
7. 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 with
the 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 plate
lens.
Turn set screw until needle
indicator and 0 on face plate are aligned.
If needle indicator and 0 indicator on face plate will not align, replace
gage.
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