VARIACIÓN DEL COMPORTAMIENTO DINÁMICO CON LOS

When a safety device is activated, the user interface LED will be flashing, and an error code will be displayed.

A list of all errors can be found in the table below.

Code Error code description

Possible reasons Correction methods

E0 Plate heat exchanger outlet water R1T sensor failure

1) R1T sensor open circuit 2) R1T sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB E1 Domestic hot water

R4T sensor failure

1) R4T sensor open circuit 2) R4T sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB E2 Plate heat exchanger

return water R3T sensor failure

1) R3T sensor open circuit 2) R3T sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB E3 Reserved code

E4 Condenser temp T3 sensor failure

1) T3 sensor open circuit 2) T3 sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB E5 Outdoor ambient temp

T4 sensor failure

1) T4 sensor open circuit 2) T4 sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB E6 TH temp sensor failure 1) TH temp sensor open circuit

2) TH temp sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB E7 TL temp sensor failure 1) TL temp sensor open circuit

2) TL temp sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

E8 Main EEPROM failure Main PCB damaged Replace the main PCB E9 T2 temp sensor failure 1) T2 temp sensor open circuit

2) T2 temp sensor short circuit 3) Main PCB damaged

1) Check the sensor connection 2) Replace the sensor

3) Replace the main PCB No Device Respo nse Controller communication failure

1) Connection wiring failure between main control board and controller

2) Controller damaged 3) Main PCB damaged

1) Check the connection wire (2 cores wire)/ports between controller and main PCB, and check if the controller bottom side wirings are connected correctly. Replace the wiring or reconnect the ports

2) Replace the controller 3) Replace the main PCB Eb Communication failure

between main PCB and Outdoor Unit PCB

1) Communication wiring or concerning connections failure between main PCB and Outdoor Unit PCB

2) Main PCB damaged

3) Outdoor Unit PCB damaged

1) Check the connection wiring (2 cores wiring)/ports between outdoor PCB and main PCB, and check if they are connected correctly. Replace the wiring or reconnect the ports

2) Replace the controller 3) Replace the main PCB P0 High pressure

protection

1) Water flow is too low when unit is heating water, or water temp is too high

2) Ambient temp is too high when unit is cooling water or outdoor fan’s ventilation is bad

3) Too much refrigerant 4)Pressure switch failure 5) Outdoor Unit PCB damaged

1) Check whether water flow fit requirement, check whether plate heat exchanger inlet water temp is too high

2) Check unit ventilation 3) Purge surplus refrigerant 4)Replace pressure switch 5) Replace Outdoor Unit PCB P1 Low pressure

protection

1) Too less refrigerant

2)The electronic expansion valve assembly damaged

3) Pressure switch failure 4) Outdoor Unit PCB damaged

1) Check leakage and charge more refrigerant

2) Replace electronic expansion valve and expansion valve coil 3) Replace pressure switch

3)Water filter block

4) Water flow switch damaged 5) Main PCB damaged

3)Clear water filter

4) Replace water flow switch 5) Replace main PCB P5 Low temp protection 1)Too low circuit water temp

2)Too low circuit water flow 3)There is extra air in water system

4)Unreasonable anti freeze protection temp setting 5)Plate heat exchanger outlet water temp sensor damaged 6)Main PCB damaged

2)Adjust water pump to right gear, clear water filter, 3) Purge extra air from water system

4)Adjust to right anti freeze protection temp

5)Replace Plate heat exchanger outlet water temp sensor 6)Replace Main PCB P6 Condenser high temp

protection

1)Too high ambient temp 2)Bad outdoor unit ventilation 3)Condenser temp sensor failure 4)Outdoor unit PCB failure

1)Do not run unit until ambient temp is lower

2)Optimize outdoor unit ventilation

3)Replace condenser temp sensor

4)Replace outdoor unit PCB P7 Secondary high

pressure protection

1) Water flow is too low when unit is heating water, or water temp is too high

2) Ambient temp is too high when unit is cooling water or outdoor fan’s ventilation is bad

3) Too much refrigerant 4)Pressure switch failure 5) Outdoor Unit PCB damaged

1) Check whether water flow fit requirement, check whether plate heat exchanger inlet water temp is too high

2) Check unit ventilation 3) Purge surplus refrigerant 4)Replace pressure switch 5) Replace Outdoor Unit PCB P8 Insufficient water flow

protection (Too big inlet/outlet temp difference protection)

1) Water pump gear failure 2) Water filter block

3) Resistance of water system is too big

4)Heat exchanger inlet/outlet water temp sensor failure 5) Main PCB damaged

1) Adjust water pump to right gear

2) Clear water filter

3) Improve water system, get down the water resistance 4) Replace heat exchanger inlet/outlet water temp sensor 5) Replace main PCB

P9 Buffer tank overheat protection

1)Too low water flow

2)Buffer tank temp controller failure

3)Buffer tank elec-heater relay failure

4)Main PCB failure

1) Adjust water pump to right gear, clear water filter

2)Replace buffer tank temp controller

3)Replace tank elec-heater relay 4)Replace main PCB