Need help diagnosing a problem with a power wheelchair

Charging circuit is damaged.

Did you charge it at all during the 3 months? Did you store chair on a full charge? Check to see if batteries are dead. Batteries should be disconnected and/or stored on a full charge. If left connected they should be fully charge every week.

Most of the time it may be the batteries at fault. One more thing to try is charging the chair with the Joystick on all night 10-14 hours uninterrupted charging. Your chair may suffer from current roll back. There is a circuit in your system that has to be reset by the long charge cycle to reset it. I did not make this up. it occurs when the motors over heat or have a a large current draw. the chair will operate normally for ten maybe even twenty mins. then suddenly drop down to 2 flashing red lights.

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Replace the batteries and charge before use then charge nightly for 20 days Use the chair daily so you can get a good charge nightly to get the batteries operating at 100% After the 20 days If you don't use the chair daily always store fully charged and then charge once a week overnight. Should work fine once you get the new batteries in You will need to get 2 U1 batteries for your chair do not get Wally World or automotive batteries You must replace with sealed deep cycle batteries made for power chairs Hope this helps

John usually the cause is that the batteries are getting weaker and need to be checked and replaced if needed The batteries will last about 2-3 years if charged correctly. But you can develop a battery that has become weaker and this affects the other battery as well. So you have to replace both batteries I have seen new batteries last only 3-6 months because of a bad battery New doesn't neccessarily good A tech should perform a load test on your batteries to determine if they need replacing Hope this helps you

NEW BATTERIES NEEDED TRY CHARGING CONSTANT FOR 16 HOUR IF POSS OR OVER NIGHT. IF BATTS KEEP FAILING THEN SERCH NEW BATTERIES ON THE WEB A PLACE IN WALES DO THEM NEXT DAY DELIVERY GOOD VALUE

Yep It sure does Why didn't you charge the chair for 2 months? Charge at least once a week if you don't use it daily. Always break in the new batteries by using the chair daily for 10-15 days charging everynite then charge once a week if it sits for that long without use. Always put up fully charged. Do this and your batteries should last 3 -4 years Charge overnite if you use daily and never charge more than 24 hours Good Luck

You answered your own question> lasts 5 min you need new batteries

It sounds like a battery problem more than anything. If it were a fuse, the chair would not move at all. When batteries are stored, they need to be kept charged by charging every couple of week or so (ideally). There may be other problems causing this, such as a short somewhere or a problem with one of the motors/brakes/electronic componets draining the batteries, but I feel this is unlikely given what you have described. I would have the batteries checked at a dealer with a proper battery tester. Preferably have the charger checked at the same time. We use a specific battery/charger tester in our shop that is connected to a computer and will give a graph of the battery/charger condition. This way there is no arguments as to whether the batteries or charger is faulty. Hope this has helped.

Yes your batteries have dropped below 9 vlt each and they wont chage using your charger. Yuo must take a car battery charger and charge each battery up to at least 11vlts for your charger to charge! This ought to work if batteries have only been sitting a couple of mths . When using a car charger set charge at 6-10 amps for about 45mins to 1hr then hook up chair charger and you should be ok