If needed, cut stew meat into evenly sized pieces. You want them to be about 2" chunks.
Add beef to instant pot and sprinkle with salt and pepper
Top beef with diced onion, celery, tomatoes and balsamic vinegar.
Place lid on instant pot and turn vent to seal. Pressure cook for 45 minutes.
Quick release the pressure. Stir the stew contents. Then add carrots, potatoes and water to the pot.
Return lid to instant pot and turn vent to seal. Pressure cook for 2 minutes.
Quick release the pressure.
Taste for seasoning.
Notes
It helps to run the lid and seal of the instant pot under cool water when pressure cooking back to back. This allows the silicone to contract and create a better seal.