FH120, FH220, FH255, FH055 Error Codes

PP01 or PP1 - Inlet Water Temperature Sensor Failure

Problem	Check connection of the inlet water sensor OR Check if the sensor is broken
Solution	Re-connect the sensor OR Replace the sensor

PP02 or PP2 - Outlet Water Temperature Sensor Failure

Problem	Check the connection of the outlet water sensor OR Check if the sensor is broken
Solution	Re-connect the sensor OR Replace the sensor

PP03 or PP3 - Coil Temperature Sensor Failure

Problem	Check the connection of the coil temperature sensor OR Check if the sensor is broken
Solution	Re-connect the sensor OR Replace the sensor

PP05 or PP5 - Ambient Temperature Sensor Failure

Problem	Check the connection of the ambient temperature sensor OR Check if the sensor is broken
Solution	Re-connect the sensor OR Replace the sensor

PP06 or PP6 - Protection for Over/Big Temperature Difference Between Water Inlet & Outlet

Problem	1: Check if the high-pressure switch is broken* 2: Check if there is a blockage in water circuit OR water flow is not enough 3: Check if there is blockage in refrigerant circuit*
Solution	1: Remove the jam 2: Increase the water flow volume 3: Repair or replace the water pump/Pressure Switch

PP07 or PP7 - Anti-Freeze Protection for Cooling/Winter Anti-Freeze Protection

Problem	Refer to PP06 OR No action needed
Solution	No action needed

EE01 or EE1 - High Pressure Protection

Problem	1: Check if high pressure switch is broken 2: Check if there is a blockage in the water 3: Check if there is a blockage in refrigerant circuit*
Solution	1: Replace high pressure switch* 2: Remove the blockage or increase water flow 3: Send heat pump to dealer for detailed check

EE03 or EE3 - Water Flow Switch Failure

Problem	1: Check if wiring connection of flow switch is in correct position, with arrow facing the exit of the outlet 2: Check if there is enough water flow 3: Check if water flow switch is broken 4: Check if water pump failed or is off
Solution	1: Reconnect the wiring 2: Increase the water flow 3: Replace the flow switch 4: Repair or replace the water pump

EE04 or EE4 - Order of Phases Incorrect

Problem	Order of phases incorrect
Solution	Re-connect the phases in correct order

EE05 or EE5 - Failure of Over/Big Temperature Difference Between Water Inlet & Outlet

Problem	1: Check if there is enough water flow volume 2: Check if inlet/outlet water temperature sensor failed
Solution	1: Increase water flow 2: Replace inlet/outlet water temperature sensor(s)

EE06 or EE6 - Low Pressure Protection

Problem	1: Check if low pressure switch is broken 2: Check if refrigerant level is low* 3: Ambient temperature(outside temp.) and water inlet temperature is too low
Solution	1: Replace low pressure switch 2: Fill up with enough refrigerant* 3: Decrease Water Flow 4: Send heat pump to dealer for detailed check

EE08 or EE8 - Communication Failure

Problem	Check the connection(s)
Solution	Re-connect the connection wire(s)

WARNING

It is strongly advised that customers or non-HVAC certified technicians do not attempt any repairs on the refrigerant coil system or attempt to refill the refrigerant (such as Freon) in the heat pump. These systems require precise amounts of refrigerant, and improper handling can lead to significant damage to the internal components, void warranties, and pose safety risks. Always seek professional assistance from a certified HVAC technician for any refrigerant-related issues or repairs.

FH120, FH220, FH255, FH055 Error CodesUpdated 5 months ago