Uwatec R390 User manual

13

SCUBAPRO R390 – R380 Second Stages

Trouble Shooting Guide

Symptom Correction Tools Needed

Continuous slow leak from

second stage

Readjust orifice or Nyloc nut Replace poppet, seat or spring Universal tool/ ¼” nut driver

Continuous slow leak from

second stage

High IP – See first stage trouble shooting Universal tool/ Pneumatic

adjustment tool

Inhalation effort is lower than

specification

Tighten nyloc nut (3 threads maximum) Replace spring Universal tool/ ¼” nut driver

14

SCUBAPRO R390 – R380 Second Stages

Trouble Shooting Guide

Symptom Correction Tools Needed

Inhalation effort is higher

than specification

Readjust orifice or Nyloc nut Use a supply pressure of at

least 1500 psi/100 bar

Readjust nyloc nut - Lever

too low

Universal tool/ ¼” nut driver

Inhalation effort is higher

than specification

Replace spring Increase IP – See first stage

trouble shooting guide

Replace lever Universal tool/ ¼” nut driver

Violent free flow from

second stage

Re-adjust VIVA control High IP – See first stage trouble shooting

guide

Pneumatic adjusting tool

15

SCUBAPRO R390 – R380 Second Stages

Trouble Shooting Guide

Symptom Correction Tools Needed

Violent free flow from

second stage

Replace seat or spring Replace orifice/o’ring Readjust orifice Various

VIVA does not provide

continuous flow of air at the

MAX setting

Readjust nyloc nut - Lever too low Readjust orifice or nyloc nut Universal tool/ ¼” nut driver

VIVA does not provide

continuous flow of air at the

MAX setting

Check VIVA vane for correct position Replace lever VIVA Removal tool/ ¼” Nut

driver

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