AirSep MN138-1 H - Manual (Page 13)

7
MN138-1 Rev H
02/14
VisionAire Intermittent Alarm Indicators
Condition No
Power Low O2 Low
Pressure
High
Pressure High
Temperature No
Flow
Audible
Alarm One beep Two
beeps
Three
beeps Four
beeps Five
beeps Six
beeps
If the high pressure alarm is activated, the compressor and valves will shut down, and the
audible four–beep alarm will continue. This alarm remains on until you set the
I /0 power switch
to the “0” position.
Refer to Section 5.0 for alarm identifications, and a list of probable alarm causes.
2.3.1 Start Up
Each time the VisionAire unit is turned on, an alarm should sound for approximately four
seconds.
2.3.2 Power Failure Alarm Test
To test the power failure alarm, disconnect the unit from power, set the l /0 power switch
to the “ I ” position. This should activate the audible one-beep alarm.
If the unit has not been used for an extended period of time, it needs to
operate for several minutes to recharge the power failure alarm.
2.3.3 No Flow Alarm Test
To test the no flow alarm, place thumb over oxygen outlet to completely block flow for
approximately 10-15 seconds. The flow meter ball should drop to zero and the 6-beep alarm
should be activated. (Note: not all units were originally manufactured with a no flow alarm.
Units equipped with main circuit boards prior to rev. R will not have this feature.)
2.4 Oxygen Concentration Test and Specification
To ensure that the unit’s output of oxygen is within specification, you must perform a test
of the oxygen concentration. Test the unit upon delivery to a patient and at periodic
intervals. Equipment Providers need to establish and implement a protocol to check
oxygen concentration.
1. If a humidifier bottle is used, disconnect it.
2. Connect a calibrated oxygen concentration analyzer to the oxygen outlet.
3. Verify that the product flow rate delivered by the unit matches the patient’s
prescription and does not exceed the capacity of the unit.
4. Set the unit’s l /0 power switch to the “ I ” position. Allow approximately five minutes
for the oxygen concentration to stabilize. Take oxygen concentration readings and
verify levels are within specification at the liter flow being tested.
5. Disconnect the oxygen analyzer, and reconnect the humidifier bottle.
Do not measure oxygen concentration output after the product stream passes
through a humidifier bottle, or erroneous readings will result.