Here are some non-approved instructions for pressure frying chicken at home:
Pressure Cooking Question and Answer
The maker of your home pressure cooker says don't do it. I say you're responsible for whatever happens. I've never done it and also disclaim any liability.
If you do do this, check your seals regularly for any damage and replace it at the first sign of wear/damage. Having some spares on hand so you can change out the seal between batches if there's damage would be wise.
Phil