39
7. 
Error Messages and Troubleshooting
If any of the below problems occur during measurement, check to 
make sure that no other electrical device is within 12 inches (30 cm). 
If the problem persists, refer to the table below.
Display/
Problem
Possible Cause Solution
 
appears or the 
arm cuff does 
not inflate.
The [START/STOP] 
button was pressed 
while the arm cuff is not 
applied.
Press the [START/STOP] 
button again to turn the 
monitor off. After inserting 
the air plug securely and 
applying the arm cuff 
correctly, press the 
[START/STOP] button.
Air plug is not 
completely plugged into 
the monitor.
Insert the air plug 
securely. Refer to 
sub-section 2.6.
The arm cuff is not 
applied correctly.
Apply the arm cuff 
correctly, then take 
another measurement. 
Refer to sub-section 2.6.
Air is leaking from the 
arm cuff.
Replace the arm cuff with 
a new one. Refer to 
section 9.