Question about Pride Mobility Victory 3 Wheel Electric Scooter

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I think I have a lemon Pride victory scooter.We have replaced the throttle pot,speed control, 2 new complete transaxles with brake and motor, and batteries and it still does not work properly. After about 20 minutes of running, suddenly the meter needle slowly goes into the red. These batteries just came off the charger and we have tried 2 sets.The motor 's tempture feels normal for the first 15 or 20 minutes but then it feels very,very hot. I believe the batterie are almost completely discharged at that point.My technician is at a loss as to where to go from here as he has done all of the above repairs. Pride is no help as they will only talk to technicians which he has done. Any Ideas anyone.

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  • osaki2000 Apr 03, 2011

    How do u disconnect the charging circuit from the battery ?? Robert stearns

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Do you have any idea how hot the motors should run under normal conditions ?. The only way to confirm is to connect an Ampere meter in series to the motor while running. For which you will have to disconnect the positive wire ( RED ) going to the motor and connecting a 25 Amps Amp meter in series. Run the scooter after a full charge and monitor the reading, if after the mentioned 20 minutes the reading starts shooting up to more than double you are having insulation breakdown in the motor. It means replacement of the motor or rewinding.This insulation breakdown is what causes our house MCB's to trip when a faulty the washing machine runs for sometime.The enamel coating in the motors copper starts to short the windings on heating up thus increasing the current consumption. hats why the Amp meter in setries.
Second thing you can check is
After a full charge disconnect the charging circuit from the battery and then try driving and see how long it runs. The battery charging circuit has a rectifier which can go faulty and can short when hot.

Posted on Apr 03, 2011

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I think you have a termperature sensor related problem. Most every model of Pride Scooter has this statement in the troubleshooting procedures:

! Determine the temperature of the power chair at the time the problem occurred. The (add your model here) electrical system will protect itself from overheating when its internal temperature gets too high by reducing the amount of power sent to the motors. When this happens, the power chair will gradually slow to a stop. Allow the power chair to cool down and it will resume normal operation.


What if the range per charge of my (add your model here) diminishes over time?

! Determine if the batteries have ever been replaced. Batteries over a year old may be defective.

! Determine how frequently you charge the batteries in comparison to how often you use the power chair.

If you use your power chair on a daily basis, you should charge the batteries every day for 8-14 hours.

! Determine when the batteries were last charged. Even if the power chair has not been in use, the batteries should be charged once a week for 12-14 hours.

! Determine how long you let the batteries charge. It takes 8-14 hours to fully charge a depleted set of

batteries; continual undercharging reduces the overall life of the batteries.

! Observe the battery condition meter during battery charging to determine if the batteries are receiving a charge. If the battery condition meter does not go up when the battery charger is plugged into the charger power cord receptacle and an electrical outlet, the batteries are not getting charged. Check the charger fuse and ensure the electrical outlet is good.

! Determine if a wall switch controls the electrical outlet used for battery charging. If a wall switch does control the outlet and the switch is turned off inadvertently, the batteries will not fully charge.

! Is an extension cord being used to connect the battery charger to the electrical outlet? Pride prohibits the use of an extension cord when charging the batteries. The charger should be plugged directly into a properly wired standard electrical outlet as the length and condition of the extension cord can have an adverse affect on the battery charger.

! Determine how far you let the battery condition meter LEDs go down before charging the batteries. If

you continually allow the battery condition meter LEDs to fall into the red area, the overall life of the batteries will be reduced.


Ok enough with the copy and paste. I would also be looking at wiring harness plugs for any heat related signs on the plugs and connectors. A loose connection caused by heat / bad connections will turn the connection and the harness into a heating element. A complete harness inspection is necessary from the battery, relays, the joystick and the drive motors. Any sign of chaffing on the harnesses also. The wiring harness is a KNOWN problem with these scooters (at least by those of us that work on them) due to connector problems.


The only other thing I can think of is that maybe the drive motor and the brake are being actuated at the same time. (You would think due to design it would just lock up if this were the case.) However, If the drive voltage is higher than the brake voltage then it is possible to get slower than normal movement and rapid battery depletion.


I really believe you have a temperature related / normal operation problem. The soultion is going to be find out why there is such a rapid heat build-up that causes the scooter to slow down and stop as it gets hot. (^-


Kelly



Posted on Apr 04, 2011

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