Completed maintenance on 4 central a/c systems 3 daikin units and 1 carrier system. There are 5 systems total in the home. The 1st floor system air handler is located in the nanny‘s quarter’s above the ceiling. 2nd, 3rd and 4th fl air handlers are located in hallways above the ceiling. The last air handler is located on the top floor closet above the ceiling. The 1st floor system and the 2nd floor system are older r-22 units. The 2nd floor system is low on r-22 refrigerant this system is outdated and past it’s life expectancy system needs replacement. On arrival the 1st floor system was not operating properly the indoor unit was blowing air but not cold. Found the breaker to the condenser on the roof was tripped. the breaker panel is located on the roof near the condensers. All operations and pressures were checked and all outdoor condenser coils were washed with a hose there is water access on the roof near roof access door. All units besides the 2nd floor system are operating