Samsung RT53 enter forced defrost mode

My Samsung refrigerator is RT53DG6650S9FZ Evolution Series, brand new model. Freezer at the top.

After 4 months it started to hold snow at the top of the freezer and the fridge wasnt cooling enough. I checked and there was malfunctioning on the heater. After checking, 90 ohms and 120V to activate it from the board, ok.

But since I defrosted it naturally, it's going to take a lot of time to test the defrosting.

So I want to enter on FORCED DEFROST MODE, by holding FRIDGE and POWER COOL buttons inside the fridge (test mode). But I havent found any tech guide manual and there is a LOT OF OPTIONS when holding both buttons to enter test mode. I'm wondering if someone could have the SERVICE GUIDE MANUAL of this model.

I have found on Scribd an early version, which does not seems to work. I believe they changed how to enter test mode.
Scribd service manual

Does anybody know how to work on test mode or forced defrost mode to test my heater or have this tech service manual updated? Samsung won't help me sending me this tech guide, since i'm only a customer who likes to fix things by my own.
There is a picture from my led panel inside the fridge.