I’ve received my k1 yesterday and I’m getting error key:502 as soon as I start to print, the mb fan isn’t spinning, but it’s moving freely. Also tried to disconnect and connect, updated the firmware from 184.108.40.206 to 220.127.116.11, then to 1.3.28, and nothing solves the issue.
I usually ask if you did a factory reset.
Assuming you did, can you check the connection path?
Do you have access to a multimeter or a power supply to see if the fan is:
A) Getting juice B) getting enough power C) Fried
I keep a lot of spare parts and such for testing out of necessity.
If you find a solution, please let us know.
If there’s anything you need to know, one of us here can probably help!