I am in need of a wiring diagram so I can troubleshoot my dad's wheelchair. I am getting no power at all to charge the batteries, but I do get 24 volts out of the built in charging system. I just need to see how the electric current flows from the charger to the batteries. It has controls on the right hand side arm rest, but I don't know if that controls the charging or not. Any help would be greatly appreciated. I am a TV technician who has given many tips on TV's on this site so I will fully understand any schematics that one could offer me.
Have a great day.
If you are getting juice to the battery terminal and the batteries are not charging it is because the batteries have fallen under 12 voltsDC. If the system detects batteries that are depleted that low,it cant bring them back up. So you will need to get the batteries on a trickle charger or slow car charger. That way you can bring them back up to around 12 volts each. At that point the inboard charger can do the rest.
I really think the batts have fallen under 12volts each. If they are under 12 V each 24 chained the charger can bring them up to 24. What kind of reading are you getting on one of the batteries?
Ohhhh Yeah, Those are deader than dead. You may have to buy a new set. But get them on a car charger and see what happens.
Ohhhh Yeah, Those are deader than dead. You may have to buy a new set. But get them on a car charger and see what happens.
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If the charger is putting out about 26-28 volts, then it isn't "seeing" the batteries as one or both of them have dropped below the reference voltage required for the charger to "see" them and allow the charge to start. This is usually a voltage less than 20 volts. Check the voltage at the terminals for each battery. A good reading is 12-14 VDC. If either battery is 10 or below, then it is most likely dead and cannot be brought back. Use extreme caution when putting any sealed deep-cycle battery on a standard auto-battery charger!
Car batteries are not sealed air-tight, like scooter and powerchair batteries. Charging generates hydrogen-sulfide gas which is released from non-sealed batteries. Sealed batteries, like yours, must be charged very gradually, with pauses in the charging process to allow the gases to subside, ortherwise the battery case can expand and explode. Use the lowest amperage setting on the auto-charger, and take it off charge after 15-20 minutes, let it rest, and repeat till the voltage is above 12 VDC, then reinstall in the chair and put it back on the 24VDC charger to finish. IF, and it's a big if, the battery comes back to life, all's well and you are off and running. Otherwise, you'll need to replace both batteries, fully charge before use, then proceed. Always replace with sealed gel batteries recommended for your equipment.
Good luck
High I'm no electrician but check that the charger is delivering DC rather than AC as you can only chrgae the batteries with DC.
I hope this helps
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To be clear I have 24 volts at the charger but not at the battery terminals. What is in between that would halt the flow to the batteries from charging? There is a fuse and a circuit breaker but those are checking normal.
The max I get is 1.7 volts. So you are sayng that the charger will not put out a charge if the voltage is that low? If that is the case I will try and hook them up to a car charger to see if I can bring them up slowly.
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