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TROUBLESHOOTING
If the Air-Oxygen Blender fails to function, consult the Troubleshooting Guide below. If problem can-
not be solved by using Troubleshooting Guide, refer to the Air-Oxygen Blender Service Manual (P/N
R203M10) available on the Internet; www.maxtec.com or consult your Provider.
Problem Probable Cause Remedy
Oxygen concentration
discrepancy between Blender
setting and Analyzer/Monitor
(greater than 3%)
1. High Flow model, flow
requirement below 15 l/min.
Low Flow model, flow
requirement below 3 l/min.
2. Analyzer/Monitor inaccurate
3. Low flow bleed obstructed
4. Gas supply contaminated
5. Downstream device causing
back flow or restricted flow
1. Use auxiliary outlet &
engage bleed
2. Recalibrate Analyzer/
Monitor or Verify with
second Analyzer/Monitor
3. Remove obstruction
4. Check gas sources with
calibrated Oxygen Analyzer/
Monitor to confirm Oxygen
is 100% and Air is 21%
5. Isolate Blender. Check
oxygen concentration at
Blender Outlets
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. Dierence between Oxygen
and air inlet pressures
greater than specified
1. Correct pressure dierence
until Air and Oxygen
pressures are within
specification
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