Service manual

56 Infant Flow
®
SiPAP
675-120 Revision D May 2005
Error
Code
Fault Condition Consequence
Software
Response
Corrective
Action
E32 Zero valve activation fault
(via sense).
Unusable – pressure
sensor readings
unreliable.
User lockout
‘Error number’
prompt.
Replace the
pneumatics
PCB and re-
calibrate O
2
and pressure
sensors.
E33 Unable to auto zero
pressure sensor.
Unusable – pressure
sensor readings
unreliable.
User lockout
‘Error number’
prompt.
Replace the
pneumatics
PCB and re-
calibrate O
2
and pressure
sensors.
E41 Dump valve not connected
(via sense).
Restricted - no over
pressure protection.
Restricted mode
‘Error number’
alarm prompt.
Replace the
pneumatics
PCB and re-
calibrate O
2
and pressure
sensors.
E42 Dump valve activation fault
(via sense).
Restricted - no over
pressure protection.
Restricted mode
‘Error number’
alarm prompt.
Replace the
pneumatics
PCB and re-
calibrate O
2
and pressure
sensors.
E50 Oxygen sensor fault (ADC
hits rail).
Unusable – oxygen
sensor readings invalid.
User lockout
‘Error number’
prompt.
Replace the
pneumatics
PCB and re-
calibrate O
2
and pressure
sensors.
E51 Oxygen sensor cannot be
calibrated by user (bad
offset or high gain).
Unusable – possible
fuel cell, electronic,
blender or gas supply
fault.
User lockout
‘Error number’
prompt.
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 and
gas supplies.