Table 1. Troubleshooting Guide - Aqua Lung SECOND STAGE Service Manual

F I R S T T O D I V E
SYMPTOM
nd
Leak or free flow at 2 stage
Insufficient purge flow or work of
breathing too high
Water leak

Table 1. Troubleshooting Guide

POSSIBLE CAUSE
1. MP too high
2. The valve (18) is worn or damaged.
3. Le seat (9) is not correctly adjusted
4. Le lever (8) is bent
5. The sealing face of the seat (9) is
damaged.
6. The spring (19) is damaged
1. MP too low
2. The valve (9) is not correctly adjusted,
the lever adjustment is too low
3. MP hose obstructed
4. Le lever (8) is bent
1. Hole in mouthpiece (17)
2. Diaphragm (13) damaged
3. Exhalation valve (27) damaged
4. The venturi control O-ring (24) is dirty,
worn or damaged
5. The diaphragm is not correctly fitted
between the casing (1) and the washer (14)
6. The casing is damaged.
7. The O-ring (4) is damaged.
8. The insert O-ring (4) is damaged.
TREATMENT
1. Refer to First stage Troubleshooting
Guide
2. Replace the valve
3. Readjust the seat
4. Replace the lever
5. Replace the seat
6. Replace the spring
1. Refer to First stage Troubleshooting
Guide
2. Readjust the lever and the valve
3. Clean or replace the hose
4. Replace the lever
1. Replace the mouthpiece
6. Replace the diaphragm
7. Replace the valve
4. Replace the O-ring
5. Disassemble the purge button and
refit the assembly correctly
6. Check the sealing face of the
exhalation valve. Replace the casing
7. Replace the O-ring
8. Replace the O-ring
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