Respironics 920, Instruction And Service Manual

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XII. Troubleshooting Guide
Symptom Possible Cause Possible Solution
920 will not power
up Batteries are
completely depleted Replace all six batteries
of the 920
Incorrect battery
installation Verify battery sequence.
Refer to Figure I:
Replacing Batteries in
the 920
Battery door is missing
metal contact Replace the battery
door
Numeric displays
are blinking at
once per second Battery voltage is low Replace all six batteries
of the 920
Incorrect battery
installation Verify battery sequence.
Refer to Figure I:
Replacing Batteries in
the 920
Minus sign
appears in SpO
2
display
Sensor fault exists.
Sensor may have
become dislodged
from 920 or from the
patient Verify sensor is
connected to the 920
and the patient correctly;
Try a new sensor if
condition persists
Segments of
SpO
2
or
♥
display
are missing
Defective LED displays Displayed values may
not be reliable;
discontinue use of 920
Displayed pulse
rate does not
correlate to pulse
rate displayed on
ECG monitor Excessive motion at
sensor site may be
prohibiting the 920
from acquiring a
consistent pulse signal Eliminate or reduce
cause of motion artifact
or reposition sensor to
new sensor site where
motion is not present
Patient may have an
arrhythmia resulting in
some heart beats that
do not yield a perfusion
signal at sensor sight Examine the patient:
Condition may persist
even though both
monitors are functioning
properly if patient's
arrhythmia persists
Non- Respironics
sensor is being used Replace sensor with a
Respironics sensor
ECG monitor may not
be functioning properly
Examine the patient:
Replace ECG monitor
or refer to operator's
manual for ECG monitor