hi guys !
the ptc is there to precharge the capacitor inside the controllers (it's there to leak some voltage bypassing the contactors ) capacitor can get empty after a long period of time or after being sucked.... make sure all accesories and key switch is off when replacing batteries... unpluging the battery key switch or accessories on, you *** the capacitor.. plugging back the battery when key is on and the operator on the seat is the best way to get these error code ! hope this help