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Posted on Jan 02, 2017
Some chairs, like the M91 are a real bear to replace the batteries and connectors can get knocked loose in the process. First, using a voltmeter you need to see if the controller is getting power. On the DC setting, use voltmeter at the three-pin female connection at the joystick that is the charging port. The two pins that are opposite each other are the "hot" pins, and your meter should read about 25 volts, +- 2 volts. If its 0, there is a connection that isn't made from the batteries through to the controller, or the controller or joystick is shot. If you do have power to the joystick, then it's probable that the joystick is shot. A new one from Invacare is pricey, around $1,000.00 I have found a new site that can repair most makes. I have not used them, so cannot vouch for their work, but give them a call and see what you think.
If you don't have power, start at the terminals from the battery, and follow each wire back to the power control box, unplug and replug firmly as you work your way back. Check all fuses on the way. Then check all of the other connectors inside the chair, unplug, and reconnect again. Unplug and reconnect the wires leading into the power control box, and then restart chair. If no lights still, then the power control module is probably the culprit, but the address above fixes those too. The joystick and the power control module work together to make the chair operate safely. Good luck
Posted on Jul 08, 2009
The three light flash indicates a short circuit between the left motor(as you are sitting in the chair)and the battery. Check all the wiring from the control box to the motor and make sure it is not damaged in any way. If it is okay, you have most likely fried the left side motor. A new motor-gearbox assembly for this chair runs in the neighborhood of $1,400.00, or you can take the motor off and take it in for a full rebuild for about $250 or so. Unplug the joystick and remove the seat and cowl. Jack up the left side with both motors in gear. Remove the center nut cover and take off the nut holding on the wheel taking care to retain the key that slides into the groove on the axle. Disconnect the wiring plug to the motor and remove the six bolts holding the motor to the frame. Separate the gearbox from the motor and take the motor to a rewind shop for repairs. Reinstall and it should be good to go.
Posted on Jan 08, 2010
Hi. Your problem will be either the free-wheel lever is in the wrong position, or the motor has a stuck or worn carbon brush.
Good luck. Neil.
Posted on Jul 07, 2010
just replace the keypad or if you are mechanically inclined remove joystick take the top off and glue a small piece of foil to the bottom of the on/off button reassemble and try that if that doesn't fix it order a new pad from a provider in your area
Posted on Aug 17, 2010
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Ranch well the red flash indicates a low battery and the 5 flashes indicate a bad left brake. Now try charging the batteries until you get a green light on your charger then turn on the chair it shouldn't flash the red if the batteries are accepting the charge. If your batteries are 2-3 years old it could be time to change them. If Medicare paid for your chair then they will pay most of the repair costs. You can contact your provider for help or a service company like Roadrunner Mobility @ 1-800-467-2668 or Repair Xpress @ 1-877-581-3733. If Medicare did buy the chair then you are eligible for a new chair every 5 years and yours is almost 8 years old. Contact a local provider that you trust to check into getting you a new chair. Hope this helps you
Posted on Sep 29, 2010
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