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TABLE 1: TROUBLESHOOTING GUIDE
CAUTION:
Recommended treatments which require disassembly of
the regulator must be performed during a complete overhaul, accord-
ing to the prescribed procedures for scheduled, annual service. Do
not attempt to perform partial service.
NOTE:
This is a partial list of possible problems and recommended treat-
ments. For more information, contact Aqua Lung’s Technical Services De-
partment for assistance with problems not described here.
SYMPTOM
POSSIBLE CAUSE
TREATMENT
Second Stage Air
Leak or Free Flow
1.
Extremely high MP from first stage
1.
Refer to First Stage Troubleshooting Guide
2.
The MP seat (17) is damaged
2.
Replace the MP seat
3.
The seat (14) was adjusted incorrectly
or lever (15) is set too high
3.
Reset seat preliminary settings & re-
peat adjustment procedures
4.
The lever (15) is bent
4.
Replace lever
5.
The seat (14) sealing surface is damaged
5.
Replace valve seat
6.
The valve spring (20) is damaged
6.
Replace valve spring
7.
Shuttle valve o-ring (19) is damaged
7.
Replace o-ring
8.
Shuttle valve (18) is damaged
8.
Replace Shutle valve
9.
Venturi lever o-ring (11) is damaged
9.
Replace o-ring
Low Purge or
Labored Breathing
on Full Cylinder
1.
First stage has low MP
1.
Refer to First Stage Troubleshooting Guide
2.
Seat (14) adjusted incorrectly or
lever (15) is set too high
2.
Reset seat preliminary settings &
repeat adjustment procedures
3.
The MP hose is clogged or obstructed
3.
Clean or replace the MP hose
4.
The lever (15) is bent or catching on
the valve spindle (16)
4.
Replace lever
Water Entering
Second Stage
1.
Mouthpiece (9) incorrectly fitted
1.
Refit or replace mouthpiece
2.
The diaphragm (6) is damaged
2.
Replace diaphragm
3.
The diaphragm (6) is improperly
seated in case (7)
3.
Remove front cover assembly &
re-seat diaphragm properly
4.
The exhaust valve (25) is damaged
4.
Replace exhaust valve
5.
The case (7) is damaged
5.
Replace case
6.
Heat exchanger o-ring (11) is damaged
6.
Replace o-ring
7.
Venturi body o-ring (11) is damaged
7.
Replace o-ring
14