Mini split #1 Lennox Tech found system really low on R410a, suspects 4-5lbs. Found a leak at the fitting on the airhandler flare fitting. Tech spoke with Ben P. About the findings and approved the repairs on the Lennox mini split. Tech tightened down flare fitting and leak tested with soap bubbles to verify that the leaks have stopped. Tech changed system with 4lbs of R410a to acquire proper refrigerant levels and delta T as well. System is back cooling. Approval over the phone.