Hello im new to this forum.
Im trying to repair a hawker charger 24v 72a, it originally contained 2 smps module but one was taken out due to a fault, then it worked ok for some time at 36a with 1 module, but now it shows fault code. it light a red light and blinks 6 times and stops so it has some problem which i didnt find. i tested all voltajes from the ics, and seems ok. the pfc ic has its right voltaje 15v. and the a voltaje regulator ic is working lm2940ct, all power semiconductors dont show any shortcircuit, and fuses are good, tested electrolityc caps with esr meter and looks ok aswell, tried to find info of the error code "mod th" but i was unsuccesful,if you can give me any advice i will be grateful, thanks,

pd:if i find the problem cause, i will be sharing it