Question about Invacare Supply Group Invacare Pronto M91 Electric Wheelchair
I can't get my w/c battery to charge. It makes a clicking noise. The orange light blinks on & off 4 times underneath the chair then stays an a few seconds, then blinks again. The red light stays on. My wheelchair is a Pronto M91 Sure Step. It is not quite 1 1/2 yrs old.
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Posted on Jan 02, 2017
I also have a Pronto M51 and use it daily. I have found though by leaving the charger plugged in over a weekend, it reduces the battery range and does not come back to normal until I use it for a week and charge it nightly. You can overcharge the batteries because the charger does not shut off entirely. I have monitored this with my meter.
Posted on May 13, 2009
You definitely need new batteries. After that amount of time the batteries go bad and the plates inside become sulfated. They are only good as boat anchors now.
It is a easy do it your self repair. There are 2, Group 22 batteries in this model. You want to get deep cycle sealed lead acid, preferably AGM (advanced glass matt) group 22 batteries.
Flip the seating system back by releasing the lever under the front of the seat.Make sure you do not pinch the joystick wiring at the back when you do this.
Remove the black plastic cover.
The batteries will be secured by a strap which you should unbuckle.
Disconnect the plugs to the batteries and note how they are run, oriented and connected.
Pull out the batteries, one at a time, from the base.
Make the wiring connections to the battery , put the batteries back in the chair, plug everything in and you are set to go. Hope this helps.
Posted on Feb 13, 2011
SOURCE: I have a Pronto M91.
You have low batteries and need charging if you been charging and still get the red lights then the batteries need to be replaced and have the charger checked for correct output. If you have a voltmeter you can check the charger by plugging the on-board charger into the wall set the voltmeter to 200 volts dc and plug the leads into the two outter holes of the charger port located under the front of the joystick. with the charger pugged in you should be reading 27+volts if you aren't getting any reading or the reading is lower than 25 volts then replace the charger or get an offboard charger and try charging the batteries via the joystick charger port Hope this helps
Posted on Mar 17, 2011
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