York Heat Pump: YHE / YHG Re: Lockout Codes / Fault Codes The control shall provide fault codes using the Status LED. The table below describes the LED displays during fault codes. Unless otherwise specified, the control shall provide flashes that are a 1/3 second on and 1/3 second off...

York YHE / YHG Heat Pump: Cooling Re: High Pressure Fault - 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 a 3-Flash LED pattern on the outdoor unit control board. X/L Output Qty Possible...

York YHE / YHG Heat Pump: Heating Re: High Pressure Fault - Last Mode Heat Pump 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 a 3-Flash LED pattern on the outdoor unit control board. X/L Output ...

York Heat Pump: YHE / YHG Re: Low Suction Pressure - Code 5 (Cooling) CODE 5 = Low Pressure Switch Opened (2x in 6 hours) The heat pump compressor and condenser fan operate normally, but the system runs with a lower-than-normal suction pressure. Customer typically reports low or no...

York Heat Pump: YHE / YHG Re: Low Suction Pressure - Code 5 (Heating) CODE 5 = Low Pressure Switch Opened (2x in 6 hours) Qty Possible Causes: 1 Low Refrigerant Charge 1 Bad Expansion O/D Valve Bad Pressure Switch Not Defrosting CHECKOUT: ...