Question about Invacare Pronto M51 Power Wheelchair
The chair was plugged in for a couple of days in the garage. I noticed a bad burning odor in the garage and found it coming from the chair. I unplugged it and the odor went away in a couple of hours. Now the chair won't work. the joystick lights up when I turn it on, but it's the wrench symbol, It blinks 9 times, stops then blinks 9 more times. Do I need replacement batteries or perhaps something else?
A flash code of 9 indicates a communication fault. What this means is that there is a lack of communication between the joystick and the other electronic component, the controller module. In my experience, the usual culprit is that the charger plug makes bad contact inside the joystick housing causing it to heat up and burn. This can cause components inside the joystick to burn out. The other more common problem is that there is a break in the 4 wire harness going from the joystick down to the controller in the base. Sometimes it is just a matter of unplugging the connector, cleaning it, and pushing it back in. In other cases, the wire has been cut or broken along its length. Look for cuts along the black covering of the 4 wire harness (connecting cable)and twist and tape or splice and solder to repair the wires. These connecting harnesses are so inexpensive it is usually easier to replace, however a quick splice can get you going temporarily. If you smelled burning that would be an indication that the joystick assembly has burned out and I would replace that along with a new harness (connecting cable with a plug on each end) to the base electronic module.
The connecting cables have always been a weak link in this design and have had a history of failures over the years. For this reason I replace both the joystick assembly and connecting cable when servicing. Hope this helps.
Posted on Mar 22, 2014
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Posted on Jan 02, 2017
SOURCE: won't move pronto m51
Three lights flashing on your chair indicate a left motor fault. Make sure that all of the connections inside the shroud are tight by physically testing them. If all of the connections are good, and the fuses are good, then it's time for a trip to an authorized repair facility. Here is a link to the M51 owners manual if you haven't one. Page 24 has the fault code guide.
The controller monitors all of the functions on the chair, brakes, motors, joystick, charger etc. The three flash fault indicates an "open" circuit. Open, like a switch or blown fuse is open, or a wire is cut or burned in half, or a connector is unconnected, or partially connected. The latter is what you are hoping for. Wires burned in half is the usual cause for a motor fault, and with powerchairs, is usually the result of the chair getting stuck in or against something it can't get out of and the operator over-amping the motors. Motors do, just go bad sometimes, for no reason. Very rarerly, however.
You can also check the brushes on the motor too. There's two quarter-sized black plastic screw-plugs on the ends of the motor opposite each other. Unscrew them and examine the brushes. The springy coils should be springy. Overheating can cause them to be brittle, or even burned in two. Check the lench of the brush, the dark rectangular cube at the end of the springs. It should be curved and polished at the end, and a little over a half-inch long. If it is near a 1/4 inch, it needs replaced, or if there is any evidence of overheating, replace. Good luck.
Posted on Jul 09, 2009
Yep you got it right its the batteries replace them with U1 batteries, charge before use and you should be good to go Good Luck
Posted on Nov 06, 2010
The 9 flash error code indicates a communications fault. The communication fault relates to the communication between the joystick and the control module. The joystick on the arm mount is connected to the control module in the base. When there is a break in the wiring of this wiring harness, also called a bus cable, a fault occurs. This trips the computer and the computer sends out a flash code to the joystick. Simply stated there is a broken or pinched wire between the joystick and controller. Look physically at the wire and check for cuts, breaks or pinches. The best short term repair is to repair the broken wire with solder and heat shrink or tape. You can also use **** splice connectors and tape. The best long term repair is to replace the harness with a part available from Invacare. The most definitive way to diagnose this problem is to read the fault log of the controller using a hand held programmer available to dealers and certified technicians. The number and type of fault codes logged in the controller is another indicator of which
component(s) has failed. Hope this helps.
Posted on Nov 20, 2010
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