I have never had the burn message. I don't know why.
I've had it show up twice, the first time took me completely by surprise and was quite disconcerting. I could see it had switched off and there was an error message, but it took me a while to realise what the problem was.
The first time was when I made a pot of chilli that started with sautéing a lot of vegetables and spices. Normally after sautéing I add a glug of wine and stir the bottom of the pot with spoon, to lift any bits that have stuck during the sautéing process, but that time I forgot and a few minutes into the start of pressure cooking the machine gave some distressed beeps and a message saying BURN. I let the pressure go down, opened the lid, poured the contents into the second pot and put that in to cook while the pot with burnt on bits soaked in the sink.
The second time that I got the burnt error message was when I was making plaki - those Greek gigantes beans in tomato and garlic sauce. I had added two cans of chopped tomatoes to the soaked beans, but had very been stingy with the stock, allowing the tomatoes to overheat and trigger the burn error. That time I just needed to add a can of water, stir it in and restart the 50 minutes pressure cooking time.
I have all my grains, rices, pastas in storage containers labelled with ratios and IP cook times
That's a stroke of genius Womanity, I stick a bit of masking tape with the cook times of pasta after transferring them to storage containers, but never thought to add the IP cooking ratios & times to the rice and grains. I always end up searching for the recipe folder in my laptop, then finding the pressure cooker folder, opening the rice & grains folder and finally the saved .pdf of the web page to check the details of the cooking instructions. So much smarter to do it once and save the details in plain sight, on top of the different rice and grain containers.