Welch Allyn Spot Vital Signs 4400 Service Manual page 104

100 Appendix
Symptom
The NIBP cuff does not inflate.
NIBP is not functioning.
Possible cause
The dual lumen switch failed.
There is a leak in the pneumatic system.
The NIBP module malfunctioned.
The main board malfunctioned.
The dual lumen switch failed.
Suggested action
Replace the main board.
Ensure that the cuff is the
properly sized.
Clean the cuff connections.
Replace the cuff and tubing.
Replace the main board.
Ensure all cuff attachments are
tight. Carefully check for leaks
in blood pressure cuff and
tubing attached to the device.
Replace the cuff.
Update the software.
Perform NIBP functional
checks.
Perform NIBP calibration
checks.
Replace the pump assembly.
Replace the main board.
Update the software.
Perform NIBP functional
checks.
Perform NIBP calibration
checks.
Replace the pump assembly.
Replace the main board.
Update the software.
Perform NIBP functional
checks.
Perform NIBP calibration
checks.
Replace the pump assembly.
Replace the main board.
Ensure that the cuff is the
properly sized.