York Package Units: PHE Re: Fault Codes / Diagnostic Codes Red Light Status Description Off No Power to Control On Compressor Operation Active Slow Flash Normal - No Compressor Fast Flash Anti Short Cycle Delay 2 Hi Pressure Fault (Not in Lockout...

York Pkg Heat Pump: PHE Re: Not Defrosting / Outdoor Coil Frozen The PHE uses a Demand Defrost control board. The board uses an Ambient (outdoor) Sensor and Liquid Line Sensor to determine the proper conditions for defrost to occur. Qty Possible Causes: Bad Liquid Line Sensor...