Respected Team, I have 12/50 Centaur battery charger. When i apply Power 230VAC.Green LED on but 12VDC output not came, Toggle switch on GEL (Off-Off-On). Please guide for pre-requisite. Moreover, kindly guide about Variable Pot VR701 and Jumper TP1, TP2, TP3, TP4 use and application.