Sherwood MAXIMUS SRB3600 - Manual (Page 23)

7.0 HELPFUL HINTS
7.1 TROUBLESHOOTING REGULATORS
POSSIBLE CAUSE RECOMMENDED ACTION
HIGH INSTALLATION EFFORT AT DEPTH:
a. Inlet filter clogged. Replace the filter.
b. No air flowing through the dry air bleed Check the flow rate coming out of the
system. one-way bleed valve . If no or low
air flow is detected, clean the flow
element in the piston, or replace the piston.
c. High pressure air supply insufficient. Verify the supply air pressure. Make sure
the customer had the tank valve turned all
the way on.
d. Second stage improperly adjusted. Repeat Steps 1 through 12 in Section 6.4,
Set-Up of Second Stage.
FREE FLOWING:
a. Intermediate pressure too high. Adjust the first stage's outlet pressure to
below 150 psig.
b. Damaged or worn HP piston seat. Replace seat (p/n 3801-5).
This also gives high intermediate pressure.
c. Damaged or worn HP poppet stem seat. Replace seat (p/n 978-9BN).
d. Nicked or corroded orifice sealing. Dress the orifices in the first and second
stages with a polishing stick, or replace the
orifices.
e. Demand lever in second stage bent too high. Adjust or replace the lever.
f. Weak spring in second stage. Replace the spring.
g. Second stage improperly adjusted. Repeat Steps 1 through 12 in Section 6.4,
Set-Up of Second Stage.
h. Parts in the second stage have been Allow the second stage to warm up to
severely chilled due to repeated purging room temperature. This chilling will not
and have shrunk, allowing air to flow. occur in normal diving conditions.
WET BREATHING:
a. Improper clearing, or diver diving in total Instruct the diver on proper clearing
head-down position. technique.
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