CareFusion Infant Flow LP SiPAP, Service Manual

Page: 62 / 96

52
Infant Flow ® LP SiPAP Model M675
675-120 Rev. G
Error
Code
Fault Condition Consequence
Software
Response Corrective
Action
E50 Oxygen sensor fault (ADC
hits rail). No oxygen monitor –
oxygen sensor
readings invalid. ”E50” displayed;
high priority
alarm. Replace the
O2 Sensor
and re-
calibrate O
2
sensors
E51 Oxygen sensor cannot be
calibrated by user (bad
offset or high gain). No oxygen monitor –
possible fuel cell,
electronic, blender or
gas supply fault. ”E51 displayed;
high priority
alarm. Check the
Error Log
screen in
diagnostics
mode. If an
E52 error also
occurs,
replace the
fuel cell and
re-calibrate the
O
2
sensor-
otherwise
check the
blender ,gas
supplies, or
circuits.
E52 Oxygen sensor calibrates
but the fuel cell is worn out
(low gain). No oxygen monitor –
oxygen sensor
readings unreliable. ”E52” displayed;
high priority
alarm. Replace the
O
2
fuel cell
and re-
calibrate the
O
2
sensor.
E53 Oxygen sensor too noisy
to calibrate (calibration
timeout). No oxygen monitor –
oxygen sensor
readings unreliable. ”E53 displayed;
high priority
alarm. Replace the
O
2
fuel cell
and re-
calibrate the
O
2
sensor or
circuits.
E54
Oxygen calibration suspect
(oxygen value has been
measured as outside range
18 – 104%) Oxygen sensor
readings unreliable ”E54 displayed;
high priority
alarm. Recalibrate
O
2
sensor. If
this fails
replace the O
2
cell and re-
calibrate.
E55
Oxygen sensor disabled by
the operator No oxygen or alarm
monitoring “E55” alarm
displayed. Re-power the
device to re-
enable
oxygen
monitoring.