Upon my arrival I performed 6 month checkups on 2 heat pump system. I flushed and treated both water removal systems, washed condenser coils using water, cleaned and treated electrical cabinets with electrical insecticide, installed new refrigerant caps on both systems then verified systems safety and performance. I found unit #2 to be low on refrigerant. I charged the system to the proper sub cooling value using 2 lbs of R410a refrigerant. The refrigerant will be included with the previous repairs with no additional charge. I also noticed that the systems were set to 70° for cool and both displayed an indoor temp of 67°. After checking the comfort control settings I found the systems were set up for dehumidification when they are not equipped to do so. I turned the function off and they will monitor if it continues to come on for cool when the demand is not about the set temp.