Infinity thermostat had two error codes not allowing the system to come on. One was a pressure switch failure and another was a communication error with the outdoor unit. Cycled power and limit error went away but the communication with outdoor unit did not. Sheldon and I decided to charge up the kitchen unit that was not keeping up. Added 5 pounds R410 A to system. I will need to return another day to locate problem with blue room. Returned to diagnose upstairs unit. Found low-voltage wire melted on the outdoor unit. Cut back wires and put in new thermostat wire to outdoor unit. System came on and operating properly. I set the zone 274°. Perform leak search on kitchen unit. Leak is in if I operator coil. Office will call and schedule date to return and change out leaking evaporator coil. System is not down