My Ultimaker original worked fine until after 8 months of waiting i got and installed heated bed kit.
The problem is that when everything is connected as it should be, ulticontroller shows MAX TEMP ERROR.
If I disconnect the black wires that goes from heated plate to HBK PCB - ulticontroler shows 70 C/0C (the bed is cold, but it shows like it has 70 C).
If I disconnect the cable that goes from Ulti. shield pins TEMP3 to HBK PCB pins BED I can heat the bed but cannot control the bed temperature (it heats up to max).
I don`t know what is wrong. Is the HBK PCB destroyed? Is the whole HBK design so bed?