Precision Trading PM5200 Manuale Utente

13

If the Air-Oxygen Blender fails to function, consult the 
Troubleshooting Guide below.
If  problem  cannot  be  solved  by  using  Troubleshooting  Guide 
refer  to  the  Air-Oxygen  Blender  Service  manual  (P/N  504827) 
available on the Internet; www.precisionmedical.com or consult 
your Provider.

Oxygen 

concentration 

discrepancy 

between Blender 

setting and 

Analyzer/monitor 

(greater than 3%)

1. High Flow model, 

flow requirement 

below 15 lpm.

Low Flow model,

flow requirement 

below 3 lpm.

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. Difference between 

Oxygen and air inlet 
pressures greater 
than specified

1. Correct pressure 

difference until 
Air and Oxygen 
pressures are within 
specification