Why does it quit pumping up the arm cuff at40 and what does E1 for on a OMRON blood pressure test

Omron error E1 means that the air is leaking from the cuff or the hose or the air hose is not plugged in correctly. First pull the hose out and insert it again. If the error persists find out about replacing the cuff.

See this manual http://omronhealthcare.com/wp-

I'm not sure why this question would be listed as being under the Heating and Cooling category, but if you are asking about the error code E1 displayed on an Omron model HEM-FL31 blood pressure monitor then I believe I can help. While the Omron user manual for this device noes not list any error codes, I would suspect that Omron uses the same error codes for all their blood pressure monitoring models, and there is a Omron troubleshooting guide available for the BP791IT model which list both the E-1 and E-2 error codes. The E-1 code is said to mean "Air plug is not connected or air is leaking from the arm cuff." You will find both the E-1 and E2 error codes on page 2 of the online pdf manual found at this link:
http://omronhealthcare.com/wp-content/uploads/BP791IT_ENG_troubleshooting.pdf

An E1 error can mean a number of things depending on the brand of your monitor and the way that you are trying to take your blood pressure. The general reason for E1 errors is to announce for whatever reason that the machine could not get a blood pressure reading.

Some common causes:
You did not let all of the air out of the blood pressure cuff before trying to take your blood pressure. Make sure that there is no air in the cuff by squeezing it or rolling it, prior to use to let out excess air.

Your blood pressure cannot be taken at this time. Sometimes this occurs if you are very nervous, overly excited, or have a fast heart rate. You can try sitting down and relaxing prior to taking your blood pressure.

You are using the wrong size cuff. If you are taking blood pressure on a small child, someone with a tiny arm, or someone with a large arm, the blood pressure cuff might not get an accurate reading. Many blood pressure monitor manufacturer's offer blood pressure cuffs ranging in size from small to extra large, and you should use the cuff that is most appropriate for the size of your arm.

You didn't line up the blood pressure cuff correctly on your arm. You can't just slap the cuff on your arm and expect it to work, it has to be lined up properly. Many companies put an arrow on the cuff to give you an idea with positioning.

You need to try a different spot on your arm. Occasionally some people cannot give a blood pressure reading on their upper arm for a variety of reasons, and you should try getting a reading on your lower arm.

If you are still having trouble with your blood pressure cuff, take your monitor with you to your next doctors appointment so that your doctor can show you how to use the monitor correctly.

found this on page 21 Monitor did not detect pulse rate Remove the arm cuff. Refer to "Applying the arm cuff" on page 13. Wait 2-3 minutes. Take another measurement
http://www.quickmedical.com/downloads/omron-hem780n.pdf

Check for leaks in cuff and hoses. Put cuff and tubes in water and look for bubbles. Bubbles=hole

find manual and check the procedure on how to adjust maximum maximum cuff pressure...

Taking your blood pressure is easy with the lightweight and convenient Omron HEM432C blood pressure monitor. Simply wrap the cuff around your arm and squeeze the bulb to begin inflation. In seconds, your blood pressure and pulse readings are displayed on the large digital panel. The Omron HEM432C has been tested, evaluated and proven to meet the rigorous safety and accuracy standards set by independent organizations.

It's likely due to either improperly seating the cuff over your arm, or the cuff being sized to small for the circumference of your arm. First make sure that the cuff is set up properly, the "hook" end of the velcro needs to be facing away from your arm. Once you double the cuff back, make sure that it is not so tight as to be cutting off circulation. If this occurs the force of inflation will cause the velcro to separate. It's also possible that the package included to small of a cuff. If so the manufactor has a largercuff here. http://www.omrononlinestore.com/JHI/guid.569520918/~/productID.4509/US/details.html

fit new batteries , check hose hose for leaks, fit it firmly around arm with hose on inside of arm near elbow joint

EE=Cuff under-inflated=not inflated enough. While cuff is inflated, keep pressing START button until pressure reaches 15-20 mmHg higher than the pressure when it stops and displays EE. Make sure at least 5 min allowed between readings.