AboutJ Cook Expertise With 25+ years experience, I am familiar with residential, commercial, and industrial HVAC equipment including but not limited to boilers, chillers, reciprocating and screw compressors. I am trained in all manners of control wiring.
Experience I currently have three HVAC licenses and Refrigeration license by the State of North Carolina. I have been in this field for over twenty years. I have been a service technician for a contractor and also worked at a state college in the repair and maintenance of steam lines and equipment. I am currently the Building Maintenance Superintendent for a municipality.
Question I have a split system Ducane heat pump and I am having an issue in cooling mode. The air handler fires up fine and I'm getting my 24v to the control board at the heat pump from the T-stat however the compressor contactor is not getting power from the board on call for cooling. I have a little green led lit on the control board as well. I can manually depress the contactor and the compressor fires up fine.
Answer There is a safety of some sort that has tripped. Have you tried turning off the outdoor disconnect and back on? This should reset any safety control that has nuisance tripped, however if it trips again, it will have to be tested to see which control is tripping. Each control is an in and out two wire safety, you can try connecting the two wires together on various safetys while it is tripped to determine which on is tripped and what it does. Thanks J
