Having prob with my 18fet controller need help

[Idontwanttopedal]

after some help i plug my new controller to my old battery pack the ca lit up and said 54v with nothing conneted was getting a -34 watt reading i then unplug the battery and coneted the motor and throttle i then plug the battery back on then turned the throttle and nothing happen. i unpluged it all and opened the controller and see r115 looked burnt i then conented the battery and with in seconds R115 is red hot. i touched and burnt my finger soon as it touched hot. what can be calling this

 

[SamRam]

Was it a Lyen controller?
And what is the designed input voltage?

 

[Idontwanttopedal]

Yes and yes controller for 72v I only powered it with 54v and yes I set low voltage cut off

 

[SamRam]

I'm guessing the resistor network poped.
Contact Lyen about changing it for Your voltage.
He usually responds promptly.

Best of luck!