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Table 1: Troubleshooting Guide
SYMPTOM POSSIBLE CAUSE TREATMENT
.High Pressure Creep
(also causes second-stage leaks)
1. HP valve (15) worn or damaged. 1. Replace HP valve
2. Valve seat o-ring (13) damaged or worn 2. Replace valve seat
(crown)
3.
Removeable HP valve seat (crown) (14)
worn or damaged
3. Replace o-ring
4. HP plug (19) internal wall damaged 4. Replace HP plug
5. HP o-ring (17) damaged or worn 5. Replace o-ring
6. HP plug o-ring (13) damaged or worn. 6. Replace o-ring
7. HP valve seat in body (12) worn or
damaged.(FST only)
7. Replace body
External Air Leakage
Or
Hydrostatic diaphragm distended or
burst
1. Blanking plug o-rings (13,28,29) worn or
damaged
1. Replace o-rings
2. Diaphragm (10) worn or damaged 2.
Replace diaphragm
3. Hydrostatic diaphragm (2) worn or dam
-
aged
3.
Replace hydrostatic diaphragm
4. Diaphragm seating surface damaged 4. Replace body
5. Diaphragm clamp loose 5. Tighten diaphragm clamp
6. Connector o-ring (13) worn or damaged
6. Replace o-ring
7. HP plug o-ring (18) worn or damaged
4. Replace o-ring
Restricted Air Flow or High Inhalation
Resistance Through Entire System
1. Cylinder valve not completely opened
1. Open valve; check ll pressure
2. Cylinder valve needs service. 2. Switch to different cylinder
3. Filter (35) is clogged 3. Replace lter
4. Very low medium pressure.
4. Adjust MP to between 130-145 psi
(9-10 bar)
NOTE:
This is a partial list of possible problems and recommended treatments.
For more information, refer to the second-stage troubleshooting guide, or con-
tact Apeks Technical Service Department for assistance with problems
not described here.
CAUTION: Recommended treatments which require disassembly of the regulator
must be performed during a complete overhaul, according to the prescribed
procedures for scheduled, annual service. Do not attempt to perform partial service.
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