Omron HEM-SOLAR Instruction Manual page 28

5.Handling Errors and Problems
Error Display
28
Cause
Pressure is too low.
Remedy
Press the inflation bulb to
inflate the arm cuff until the
reinflation symbol goes out. Or,
deflate the arm cuff and repeat
measurement after checking
that the heartbeat symbol (
has been displayed.
Refer to section 3.3.
)