In 8-quart programmable pressure cooker, program to SAUTÉ. Heat oil; add beef, breaking up chunks as needed.
Drain and rinse beans. Dice zucchini. Add beans, zucchini, tomatoes, water, pasta, and mixes to pot.
Secure lid. Place steam release valve in SEALING position. Press MANUAL button, select HIGH, and set the time to 5 min. This will take some time to get up to temperature before the timer starts to count down.
When the cook time has finished, naturally release pressure for 10 min.
Using a long-handled spoon, push the steam release valve to VENTING position. Release pressure completely before opening lid.
Just before serving, stir in spinach.
In sauté pan, heat oil over medium-high heat. Brown beef, breaking up chunks as needed. Transfer to a 6-quart slow cooker.
Drain and rinse beans. Dice zucchini. Add beans, zucchini, tomatoes, water, pasta, and mixes to slow cooker. Cover; cook on high 3 hours. The liquid should be bubbling.
With about 20 min cook time to go, add pasta. Stir to combine. Cover; cook remaining 20 min or until pasta is tender.
Just before serving, stir in spinach.