Hi all, I am doing an outboard conversion using the MARS PMAC motor and a Sevcon Gen 4 controller. I have not been able to get the motor to turn. When I twist the throttle I can hear a hissing sound that seems to be coming from the motor.
If I back off the throttle right away I get 7 flashes on the error light on the Sevcon. If I leave the throttle on for more than a second or so the contactor shuts off, and I get four flashes on the Sevcon. The seven flashes seems to be a voltage error, either too high or low voltage. The voltage at the main controller terminals stays at 50.5V with the contactor on, so well within normal for a 48V system. The four flashes is a contactor error, but the contactor seems to be operating normally. I have an ammeter hooked up, and there is no significant current draw then this happens. I looked at the DC voltage on the motor phase wires, which is a constant 11 volts or so with the controller in operating mode, but no throttle input. This starts to rise as throttle input is applied.
Any thoughts or suggestions?
Thanks,
Dave E
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