Yorkguard VI will energize the X/L terminal to flash a light at the thermostat to notify the homeowner of a problem with the heat pump. Fault Code Memory: The control will store the last 5 error codes. As new error codes are stored, the oldest is deleted. The stored error codes can be...

Heat Pump: Cooling Re: Low Suction Pressure A heat pump or air conditioner runs with a lower-than-normal suction pressure. Customer typically reports low or no cooling. Qty Possible Causes: 1 Low Refrigerant Charge 1 Bad Expansion Valve Low/No Airflow ...

York Heat Pumps: YorkGuard VI Re: Add-On Heat Pump ("Fossil Fuel") Operation When a heat pump equipped with a YorkGuard VI module is installed in an "Add-On" or "Fossil Fuel" application, the YorkGuard handles all of the "Fossil Fuel" sequences with the addition of a "Bonnet Sensor" between...

Heat Pump: YorkGuard VI Re: Compressor not Operating These heat pumps are equipped with a YorkGuard VI module which monitors and controls unit operation and defrost. An X/L terminal on the YorkGuard module sends a signal inside to flash a diagnostic light at the thermostat. ► Unlike...

York Heat Pump: Yorkguard VI Re: Low Discharge Temperature (Heating) The status lights on the module will indicate as follows: Red = On, Green = 6 Flash. If, after energizing the compressor contactor for 1 hour, the Yorkguard module senses a compressor discharge temperature lower than 90...

York Heat Pump: Yorkguard VI Re: Low Discharge Temperature (Cooling) The status lights on the module will indicate as follows: Red = On, Green = 6 Flash. If, after energizing the compressor contactor for 1 hour, the Yorkguard module senses a compressor discharge temperature lower than 90...

York Heat Pump: Cooling Re: Hi Pressure Fault + Hi Discharge Temperature Fault When checking the fault history, the Yorkguard VI shows both a High Pressure and High Discharge Temperature fault. A High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control...

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...

York Heat Pump: YZF Re: High Discharge Temperature Fault (Cooling) A High Temperature Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = 5 Flashes Red = On X/L Output 2 Flashes at Thermostat = Soft Lockout Switch opened two times in 6...

York Heat Pump: YZF Re: High Discharge Temperature Fault (Heating) A High Temperature Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = 5 Flashes Red = On X/L Output 2 Flashes at Thermostat = Soft Lockout Locked-out two times in 6...