AirSep MN138-1 H - Manual (Page 36)

30
MN138-1 Rev H
02/14
Problem Probable Cause Solution
Low oxygen concentration.
• Ambient or unit’s temperature is too
high.
• Leak.
• Reduced air intake (suction)
•
Restriction in exhaust muffler
• Contaminated sieve beds
• Weak compressor.
• Faulty circuit board.
• Faulty solenoid valve
• Unit operating above temperature
range specifications.
• Leak test and repair.
• Blocked air intake or exhaust.
• Defective cabinet fan.
• Check compressor intake path for
obstruction. Clean/remove
obstruction.
• Replace or clean exhaust muffler.
• Replace sieve beds.
• Check system pressure, and rebuild or
replace compressor.
• Replace circuit board
• Replace valve manifold.
No flow indicated on flowmeter,
and 6-beep no flow alarm is
activated.
• Flowmeter is turned off.
•
Regulator is turned off.
•
Cannula tubing blocked or kinked
• External restriction at outlet of unit
•
Internal restriction of airflow.
• Turn flowmeter knob
counterclockwise to allow flow of
oxygen.
• Unlock regulator knob and turn
clockwise to allow flow of oxygen.
• (Refer to section 4.8 Product
Regulator
• Check and Setting for proper
adjustment).
• Check cannula tubing. Replace if
necessary.
• Reduce/remove attachments from
outlet of unit (humidifier bottle,
tubing, etc).
• Check internal tubing for blockage or
kinks.
Alarm does not sound.
• Unit has been turned off for an
extended period of time.
•
Faulty electrical connection.
• Faulty buzzer.
• Faulty I/0 power switch.
• Faulty circuit board.
• Turn on unit and let run for several
minutes to charge alarm capacitor.
With unit running, disconnect from
power source and verify power failure
alarm (1-beep).
• Repair electrical connection
• Replace buzzer.
• Replace I/0 power switch.
• Replace circuit board.