EN5
Display/Problem Possible Cause Solution
appears
The monitor has malfunctioned. Press the [START/STOP] button again. If “Er” still appears, 
contact your OMRON retail outlet or distributor.
flashes
Batteries are low. Replacing all 4 batteries with new ones is recommended. 
Refer to section 3 of instruction manual 
.
appears or the 
monitor is turned 
off unexpectedly 
during a 
measurement
Batteries are depleted. Immediately replace all 4 batteries with new ones. Refer 
to section 3 of instruction manual 
.
Nothing appears on the 
display of the monitor.
Battery polarities are not properly 
aligned.
Check the battery installation for proper placement. Refer 
to section 3 of instruction manual 
.
Readings appear too high 
or too low.
Blood pressure varies constantly. Many factors including stress, time of day, and/or how you 
apply the arm cuff, may affect your blood pressure. Review sections 2 of instruction manual 
.
Any other problem occurs.
Press the [START/STOP] button to turn the monitor off, then press it again to take a measurement. 
If the problem continues, remove all batteries and wait for 30 seconds. Then re-install batteries.
If the problem still persists, contact your OMRON retail outlet or distributor.