Question about Invacare Supply Group Invacare Pronto M91 Electric Wheelchair

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M91 power chair replacement seat

Replacement Chair Seat and arms for my M-91 400 lb capasity

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Posted on Dec 18, 2012

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Posted on Jan 02, 2017

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SOURCE: Change Batteries in Pronto M91 with swivel seat.

Turned out to be a "doh!" moment. Use the lever on the side of the seat to permit swivel. Unplug Controls connector. Lift seat off unit. Remove battery compartment cover by loosening 2 Philips-head screws on the Charger cover at the rear. Disconnect cable to Electronic Controller at front of front battery. Disconnect the Red and Black battery connectors, the ones that join the 2 batteries. Lift out batteries. Transfer battery connections to new batteries. Reverse the above process to reassemble.
Solved this without any help from outsiders, including FixYa, who wanted to charge me for the solution.

Posted on Jun 13, 2009

my-mobility
  • 9 Answers

SOURCE: Can't charge Pronto M91.

Hi Bob. Unfortunately in most cases this means that the batteries have gone so flat that they cannot be “revived”. The best thing to do is take the batteries to a local battery dealer and have them checked. You may need to replace them. Another possibility is that because the batteries are so flat, the charging circuit hit a wobbly trying to resuscitate them and popped a fuse button. A simple reset may help. Happy scooting. Regards Chris… info@mymobility.co.nz

Posted on Jun 22, 2009

wcdoc1953
  • 280 Answers

SOURCE: have a Pronto m91 power chair. Suddenly stopped

Sounds like you are on the right track with your problem solving. Unfortunately you cannot determine an electronic fault by visual inspection of the components. You can see cuts, nicks, broken wires and burnt components, but this only works sometimes.
I look at the current fault code with a hand held programmer (HHP). With a HHP you can read the fault log and check out all the stored codes to get an overall idea of the history of chair problems. The 7 flash code is definitely a remote fault. You can also get this fault with a bad connecting cable between the joystick (remote) and the controller (in the base). Check this connecting cable for breaks, cuts, loose pins or connections and check the connections at both ends. You can do continuity and component checks of the remote with a digital voltmeter, but this is out of the realm of most end users.
I am assuming you have MK5 or MK6 electronics in this discussion.
The easiest test is to swap out the joystick with a known good one that either a tech has brought to your home or you have brought the joystick in to a service center for testing. The better test is with a HHP that will give you the current problem and stored information of past problems.
Weak batteries or loose battery connections can also give a myriad of electronic faults. For this reason I always check the batteries and battery connections first.
The joystick can be rebuilt, but I recommend replacement as a more cost effective solution. I always replace the joystick to controller cable too. Labor charge for this work is under 1 hour.
I can provide further information if needed. Hope this helps.

Posted on Dec 03, 2010

  • 68 Answers

SOURCE: one red light three green flash when turned on

Your chair has a motor problem. The code does not tell which side it is. Make sure both motors have the brakes in the drive position before turning on the chair. Also check that both motors are plugged into the main control module in the base of the chair.

Posted on May 01, 2011

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Mckinzie the lights will flash when charging because of the inhibit mode. After you unplug the charger and turn the chair on do you get any lights at all on the battery indicators? If not lift up the seat and check your battery cable connections the neg cable from the rear battery should be connectd to the positve side of the front battery and the rear neg should plug into the small connector of the other cable. Make sure then that the large double plug is connected to the double plug going to the controller. while the seat is up then turn the chair on to see if all the lights come on. If not check that all your connections at the battery posts are tight. Also check under the two red positve battery post covers the two fuse links to make sure they are not blown. If all of this checks out the chair should come on and operate correctly Hope this helps

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