The reason we came out today is for no cool. Upon Inspection found zone system that controls both upstairs and downstairs on a 2.5 ton heat pump. Upon inspection of the indoor system found no UV protection. No bypass damper for pressure relief when only one zone is working. Customer has no TE standard flood protection, only flood protection she has is a bulldog float switch. This float switch could fail. Upon inspection of no cool found system totally out of refrigeration. Customer approved to do a leak search with nitrogen. The nitrogen leak search indicated where the leak was and it was on the Schrader valve on the AC coil leaking. Found no other leaks present in the system.. Cleaned outdoor unit from all debris and coils. Recharge system with 7 pounds of 410 a. System currently has a 21° delta T and is working properly.