PROPRIETARY AND CONFIDENTIAL DRAFT 5 Feb 04
7 - 2
Blender alarm activates. Oxygen and/or air are discon-
nected.
Connect oxygen and/or air.
Oxygen or air pressures are low. Adjust oxygen or air pressure to
correct setting.
Both tanks may not be opened. Check cylinder gauge.
Pressure differential between the
oxygen and air supplies exceed
207 kPa (30 psi) ± 14 kPa (2 psi).
Adjust oxygen or air pressure to
correct setting.
Heater does not turn ON. Heating element is open. Refer the unit to service.
There is an internal malfunction. Refer the unit to service.
Pre-Warm Mode is not activated
upon a system reset.
System is in Diagnostic Mode. Exit Diagnostic Mode by press-
ing the reset button.
There is an internal malfunction. Replace the power and control
P.C. board.
Heater is ON, but the indicators
are OFF.
There is an internal malfunction. Replace the display P.C. board.
Cannot obtain the desired suction
pressure.
Suction jar rim gasket is worn. Replace the suction jar.
Suction jar is loose or chipped. Tighten or replace the suction jar.
Connecting hose is bent or tan-
gled.
Replace the hose.
Hose is leaking between the reg-
ulator and the bottle.
Replace the hose.
Pressure or suction gauge is not
measuring correctly.
Refer the unit to service.
Blender O
2
concentration setting
does not match the blender set-
ting.
Blender knob is loose. Refer the unit to service. Do not
attempt to tighten the knob as the
unit will need recalibration.
Blender has failed. Replace the blender or refer the
unit to service.
Blender output mixture is outside
the specified range (20.8% to
100%).
Air inlet H
2
O filter is missing or
clogged.
Replace or install filter.
Blender has failed. Replace blender or refer the unit
to service.
Patient Gas Supply measured
flow is outside of the specified
± 3% of full scale or 10% of set-
ting.
Dirty or clogged air/O
2
hose. Replace the hose.
Patient Gas Supply pressure
relief gauge exceeds 50 cmH
2
O
± 10 cmH
2
O (4.9 kPa ± 1 kPa)
Pressure relief valve has failed. Replace the pressure relief valve
or refer the unit to service.
Symptom Possible Cause Corrective Action
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