York Heat Pump: YZF Re: High Pressure Fault (Heating) The heat pump was running in normal heat mode (not in defrost) and the high pressure switch tripped. A High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = Off Red = 2 Flashes X/L...

York Heat Pump: YZF Re: High Pressure Lockout - Last Mode Heat Pump (Cooling) The heat pump was running in cooling mode and the high pressure switch tripped. A High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = Off Red = 2 Flashes ...

York Heat Pump: YorkGuard VI Re: Aux Heat Stuck On ►The auxiliary heaters stick on and the customer reports overheating of the controlled space. The Yorkguard VI board controls Aux Heat operation through the W1-Out and W2-Out terminals. Balance Point If the outdoor ambient temperature is...

York Heat Pump: YZF Re: Not Defrosting / Outdoor Coil Frozen These units use a Yorkguard VI 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...

York Heat Pump: YZE/YZF Re: High Pressure Fault (Defrost) The heat pump was running in defrost mode and the high pressure switch tripped. A Defrost High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = Off Red = 3 Flashes Qty...