Product Manual
52 Troubleshooting Welch Allyn Spot Vital Signs LXi
Table 18. No Cuff Inflation
Possible Cause Corrective Action
Connections between device and cuff 
loose
Check all connections (do not overtighten).
Table 19. Cuff Pops Off
Possible Cause Corrective Action
Inappropriate cuff size See “Blood Pressure Cuff Selection” on page 35.
If cuff continues to pop off, notify biomedical department or Welch Allyn 
Technical Support.
Cuff not applied securely Smooth hook and loop securely before inflating cuff.
Cuff applied inside out Re-apply cuff. Verify that the Welch Allyn label is facing away from arm.
Table 20. Cuff Deflating Too Slowly
Possible Cause Corrective Action and Explanation
Patient movement Have patient sit still.
Do not have arm tight against chest wall, as respiration may affect speed 
and accuracy of blood pressure measurement.
Arrhythmia Check for regularity of heart rate (palpate pulse or check device).
• Moderate to severe heart rate irregularities may make blood pressure 
difficult to measure accurately.
Small leak in pneumatic system Check cuff tubing and pressure hose for leaks.
Table 21. Temperature Malfunction
Possible Cause Corrective Action and Explanation
Error code displayed Probe is broken, replace it.
Consult Service Manual.
Notify biomedical department or Welch Allyn Technical Support.
Low temperature readings Place probe in the most posterior sublingual pocket when in Oral Mode. 
Verify the thermometer is in the correct mode.
No temperature displayed Place the temperature probe in holder prior to taking another temperature.
Check the temperature probe connection to Spot LXi, see “SureTemp Plus” 
on page 27 (SureTemp Plus models only).
Loss of tissue contact The probe has lost contact with the patient’s tissue. Once you achieve 
proper contact Spot LXi continues the temperature measurement. It is 
recommended that you take a new temperature reading.
Ambient temperature exceeds lower or 
upper measurement range limit
Bring the device into the proper ambient temperature.
• Ambient temperature range limit is 50° F to 104° F (10° C to 40° C).










