York Heat Pump: Cooling Re: High Pressure Lockout - Last Mode Heat Pump 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 X/L...

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: YZE/YZH 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...

York Heat Pump: Yorkguard VI Re: Pipe Freeze Protection (Heating) The status lights on the module will indicate as follows: Red = 7, Green = Off. The Pipe Freeze Protection alert is activated when there has been a continuous call for auxiliary heat in excess of 60 minutes. This alert is...

Heat Pump: YZH Re: Outdoor Fan not Operating YZH heat pumps are equipped with a YorkGuard VI module which monitors and controls unit operation and defrost. The factory-installed outdoor fan motor is an ECM motor with a remote motor module controlled by a direct 24VAC signal. The motor...