Sherwood Scuba MAGNUM SRB5300 Spécifications télécharger pdf (Page 23)

6.0 HELPFUL HINTS

6.1 TROUBLESHOOTING REGULATORS

POSSIBLE CAUSE RECOMMENDED ACTION

A. High Inhalation Effort at Depth:

1. Inlet filter clogged. Replace the filter.

2. No air flowing through the dry air bleed system. Check the flow rate coming out of the

one-way bleed valve . If no or low

air flow is detected, clean the flow

element in the piston, or replace the

piston.

3. High pressure air supply insufficient. Verify the supply air pressure. Make

sure the customer had the tank valve

turned

all the way on.

4. Second stage improperly adjusted. Repeat Steps 1 through 6 in Section

5.4, Set-Up of Second Stage

B. Free Flowing:

1. Intermediate pressure too high. Adjust the first stage’s outlet pressure

to below 150 psig. Remove shims .

2. Damaged or worn H.P. piston seat. Replace seat (p/n 3801-5).This also

gives high intermediate pressure.

3. Damaged or worn L.P. poppet stem seat. Replace seat (p/n 978-9BN).

4. Nicked or corroded orifice sealing. Dress the orifices in the first and

second stages with a polishing stick, or

replace the orifices.

5. Demand lever in second stage bent too high. Adjust or replace the lever.

6. Weak spring in second stage. Replace the spring.

7. Second stage improperly adjusted. Repeat Steps 1 through 6 in

Section

5.4, Set-Up of Second Stage

8. Parts in the second stage have been severely Allow the second stage to warm up to

chilled due to repeated purging and have shrunk, room temperature (this chilling will not

allowing air to flow. occur in normal diving).

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Sherwood Scuba MAGNUM SRB5300 Spécifications Page 23