Service manual

Service Manual 57
675-120 Revision D May 2005
Error
Code
Fault Condition Consequence
Software
Response
Corrective
Action
E52 Oxygen sensor calibrates
but the fuel cell is worn out
(low gain).
Unusable – oxygen
sensor readings
unreliable.
User lockout
‘Error number’
prompt.
Replace the
O
2
fuel cell
and re-
calibrate the
O
2
sensor.
E53 Oxygen sensor too noisy
to calibrate (calibration
timeout).
Unusable – oxygen
sensor readings
unreliable.
User lockout
‘Error number’
prompt.
Replace the
O
2
fuel cell
and re-
calibrate the
O
2
sensor.
E54
Oxygen calibration suspect
(oxygen value has been
measured as outside range
18 – 104%)
Oxygen sensor
readings unreliable
“E##” alarm, non-
mutable, pending
oxygen re-
calibration
Recalibrate O
2
sensor. If this
fails replace
the O
2
cell
and re-
calibrate.
E61 NCPAP Pres high valve
not connected (via sense).
Restricted -
BiPhasic/BiPhasic
unusable.
Restricted mode.
‘Error number’
alarm prompt.
Replace the
pneumatics
PCB and re-
calibrate the
O
2
and
pressure
sensor.
E62 NCPAP Pres high valve
activation fault (via sense).
Restricted -
BiPhasic/BiPhasic Tr
unusable.
Restricted mode.
‘Error number’
alarm prompt.
Replace the
pneumatics
PCB and re-
calibrate the
O
2
and
pressure
sensor.
E70 PT module fault (PTRDY
or CAN bus failure).
Untriggerable - Apnea
and PT unusable.
Reduced
functionality
‘Error number’
alarm prompt.
Check the
Patient
Trigger
interface
module/cables
are correctly
connected.
E71 No breath signal from PT
module although CAN
data does not report
Apnea.
Untriggerable - Patient
may be in Apnea but
PT module may be
dysfunctional.
Reduced
functionality
‘Error number’
alarm prompt.
Replace the
Patient
Trigger
board/cable.
E72 No trigger signal from PT
module in BiPhasic Tr
mode.
Untriggerable – No
BiPhasic Tr treatment
given to patient.
Reduced
functionality
‘Error number’
alarm prompt.
Replace the
Patient
Trigger
board/cable.