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Originally Posted by Cody C
On two of them, no. but on the other one it was flashing as though there were no pwm input.
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Cody,
The LEDs pretty much tell all. Let the controller talk to you and it will tell you what is wrong. A flashing orange indicates the PWM signal is missing. A steady orange indcates PWM is present and a "zero" speed is being received. No LED indication and no motor moving indicate the power to the controller is missing, check that the breakers are in place.
It looks like about 90% of the controller failures are PWM cable seating. On the new controllers, all but about 1/8 of an inch is inside the collar when the cable is fully inserted. If more than 1/8" is showing, it needs to be pushed in further. Visual inspection to determine blown FET cases, account for the remaining 10%. When a FET blows there is no doubt of the problem. One or more of the plastic bodies will have cracks, chunks blown off or black arc marks where the damage occured. These failures usualy have a burned odor as well. Damaged controllers can be returned to IFI for repair.