13
H
ELI
O
2
BLENDEr
HELIUM-OxygEn
TROUBLESHOOTING
If the
H
ELI
O
2
Blender
fails to function, consult the Troubleshooting
Guide below.
If problem cannot be solved by using Troubleshooting Guide, refer to the
H
ELI
O
2
Blender
Service Manual (P/N 506124) available on the Internet;
www.precisionmedical.com or consult your Provider.
Problem
Probable Cause
Remedy
Oxygen
concentration
discrepancy
between Blender
setting and
alarmed Oxygen
Monitor / Analyzer
(greater than 3%)
1. •
HIgH
flow model,
flow requirement
below 15 lpm.
•
LOW
flow model,
flow requirement
below 3 lpm.
2. Alarmed Oxygen
Monitor / Analyzer
inaccurate
3. Low flow bleed
obstructed
4. Gas supply
contaminated or
heliox concentration
incorrect
5. Downstream device
causing back flow
or restricted flow
6. Supply pressure
imbalanced
1. Use auxiliary outlet &
engage bleed
2. Recalibrate alarmed
Oxygen Monitor /
Analyzer or Verify
with second alarmed
Oxygen Monitor /
Analyzer
3. Remove obstruction
4. Check gas sources
with calibrated alarmed
Oxygen Monitor /
Analyzer to
confirm
oxygen is 100% and
verify heliox tank content
5. Isolate Blender. Check
oxygen concentration at
Blender Outlets
6. Assure heliox and
oxygen inlets pressures
are within 10 psi
No flow at
Blender outlets
1. Gas sources turned
“OFF”
2. Gas sources not
connected
1. Turn gas sources “ON”
2. Connect gas sources
Alarm sounding
1. Difference between
oxygen and heliox
inlet pressures
greater than specified
1. Correct pressure
difference until heliox
and oxygen pressures
are within specification
