Unable to complete maintenance on congregation 40 ton units. Systems are coo,ing Chapel / lobby unit : system is low on refrigerant, added 4lb of R410. Need to leak search and conduct maintenance on this system Dining room unit #2 : System is out of refrigerant and locked out on low pressure cut out. Need to leak search Dining room AC unit #1 : Outdoor fan #2 has failed and is spinning backwards. Need to replace fan motor. Model # in equipment history. Someone had turned off outdoor unit disconnects, left disconnect off