Pour the broth into the inner pot and add the potatoes and carrots. Place the salmon fillets, skin-side down, on top of the vegetables.
Pour the melted butter over the salmon and sprinkle the salt and garlic powder over the top.
Lock the lid into place. Select Pressure Cook or Manual; set the pressure to High and the time to 5 minutes. Make sure the steam release knob is in the sealed position. After cooking, naturally release the pressure for 10 minutes, then quick release any remaining pressure.
Unlock and remove the lid. Serve immediately garnished with black pepper and dill, or place the salmon and vegetables in an airtight container and refrigerate for up to 4 days.