DINAMAP*
Compact
Vital Signs Monitor
61
UUT Problem
Possible Causes
Further Checks
N12 Displayed on
Systolic display and
alarm sounding. LCD
display is blank.
N13 Displayed on
Systolic display and
alarm sounding. LCD
display is blank.
State of pneumatic system does
not concur with unit softwares
expected state.
e.g. pressure in system exceeds
ambient level despite system
being set open to atmosphere.
If a failure condition arises in the
valve control circuitry that does
not allow the cuff to deflate an
N12 error will be reported.
If pump runs continuously on
power up or remains on at any
time when it is supposed to be
off a N13 fault condition will be
set.
Determine status of valve drive
and hence locate any valve
drive problem.
Most likely to be a fault on the
Pneumatics Control Gal IC1 or
TR1 or TR4 on the PSU board.
Therefore swap or test PSU
Board.
Fault could also be caused by
Main Board Failure with IC3
being the most likely cause.
Most likely to be a fault on the
Pneumatics Control Gal IC1 on
the PSU board. Therefore swap
or test PSU Board.
Fault could also be caused by
Main Board Failure with IC3
being the most likely cause.
Fault could also be due to
defective pump current
measurement circuitry on PSU
Board.
When an NIBP
measurement is
attempted unit alarms
with the following
message on LCD.
‘N33-NIBP: Timeout
Inflation’
Leak in pneumatic system.
Test unit with known good cuff.
If unit is leaking check integrity
of internal hoses if ok swap or
test pump assembly.
When an NIBP
measurement is
attempted unit alarms
with the following
message on LCD.
‘N44-NIBP: Timeout’
Total Time’
or
‘N55-NIBP: Timeout
Pressure’
or
‘N99- No determination’
N44 and N55 warnings may be
caused by excessive movement
of patient (‘Motion Artifact’).
Main Board NIBP circuitry fault
or
PSU Board pneumatic control
fault or Pneumatic Assembly
fault
Ensure ‘Motion Artifacts’ are not
the cause of the failure.
Carryout an NIBP calibration
check this may indicate if their is
a problem with either pressure
measurement channels PT1
(shown on systolic display) or
PT2 (shown on diastolic display).
If calibration is satisfactory fault
may be due to a pneumatic
problem with cuff deflation.
The fault may also reside on the
NIBP pulse determination
circuitry on the Main Board.