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