Quote:
Originally Posted by mrphilf
Cart has a stock Curtis controller
Battery pack voltage at charging terminal 37.2v
I havent checked to see if an axle is spinning...
However I just did a load test on the batteries and one of the six is testing at absolutely zero under load but reads good with no load. Checked water level and it was a smidge low, so I filled it up.
I also have a battery meter installed on the cart. When I push the accelerator the meter drops to zero and if I plug in the charger it instantly maxes out.
I'm now guessing I smoked a battery...but is that in addition to a burnt motor? Should the cart run at least somewhat on 5 batteries?
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I suspect that would be a Curtis 1204-0xx, 275A controller with 0-5k throttle input and a 16VDC under-voltage cutback.
If the pack voltage drops below 16V under load and jumps back up to 37.x when load is removed, the controller might be shutting down and recovering rapidly, causing motor to chatter.
The only worth the battery that drops to zero under load has, is core value.
If you remove the bad battery from the pack, making it a 30V pack rather than 36V, the cart should run.
Not very fast or far, but it will move enough to verify the controller and motor are okay.
The 1204 controller is rated 24-36V, but 30V might not be enough to activate solenoid.
It probably will, but if it doesn't click, that is likely to be the reason.
Like simple man suggested, either get a used battery same age/rating as bad one, or replace all 6.