Covidien Puritan Bennett 540, User Manual, Page: 60 / 141

Alarms and Troubleshooting
3-22
Puritan Bennett 540™ Ventilator User’s Manual
Note:
Speaker and battery alarms may occur when the unti is first powered on after the internal battery has been
completely drained. Connect to an AC power source and recycle power.
WARNING
•
If the device is damaged, its external housing is not correctly closed, or it behaves in a way that is not
described in this manual (excessive noise, heat emission, unusual odor, alarms not triggered during the
start-up procedure), the oxygen and power supplies should be disconnected and use of the device
stopped immediately.
•
If you cannot determine the cause of the problem, contact your equipment supplier. Do not use the
ventilator until the problem has been corrected.
Table 3-3. Additional Problems and Corrective Actions
Problem Possible Causes Corrective Actions
No access to the
waveforms
Display waveform set to NO in Preference
menu. Set Display waveform to YES in
Preference menu.
The screen
backlight never
switches off during
ventilation
Backlight set to NO in Preference menu. Set Backlight to YES in Preference menu.
Alarm sound level
too low or too high
Adjustment of the alarm sound level is
incompatible with the patient’s
environment.
Re-adjust sound level.
Poor visibility of
the displays
Contrast adjustment is incompatible
with the luminosity of the environment.
Re-adjust contrast.
Unusual display on
the screen
Problem with the display unit.
Call your customer service representative
if the problem persists.
CAUTION: Do not expose the ventilator
to direct radiation from the sun.
The ventilator
does not operate
after pressing
I/O switch
No external power source and the
internal battery is completely
discharged.
Connect the ventilator to the AC power
source.
Light noise
Turbine noise.
Replace the ventilator and call your
customer service representative.
Whistling noise or
vibrations
Filter and/or turbine silencer
deteriorated. Replace the ventilator and call your
customer service representative.
Valve membranes damaged.
Replace the ventilator and call your
customer service representative.
Excessive heat
emitted
Obstruction of main or secondary air
inlets of the casings. Remove obstructions from all blocked
ventilator air inlets and outlets.
Condensation
inside the device
Liquid entered the device.
Replace the ventilator and call your
customer service representative.