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Installation and operation manual DC
5.4
Error code
When the unit detects a failure, an error code is shown on the controller. The following
table gives the description of the error and the action to take.
ERROR CODE
DESCRIPTION
E01
The
HP
pressure switch has detected an abnormality in the refrigerant
regulation. The sensor signals an excessive refrigerant pressure during heat
pump operation.
Contact the after-sales service.
E02
The
LP
pressure switch has detected an abnormality in the refrigerant
regulation. The sensor signals a low refrigerant pressure during heat pump
operation.
Contact the after-sales service.
E03
Faulty contact in the flow sensor.
Solution:
-Check the calibration of the water inlet and outlet valves and the water
pressure in your system must be greater than 0.9 bar
-Make sure the flow sensor wires are connected to the electronic board, to
test it, disconnect the wires and then reconnect them.
-Close the hydraulic valves, remove the flow switch, clean the inside of the
flow switch if it is dirty or has any limescale in it
Apply pressure to the detector vane to trigger the contact manually and
simulate the flow of water, if the error code disappears after one minute of
maintained pressure, it means the flow sensor is working, otherwise, if the
error code remains set, replace the flow sensor
E04
The
LP&HP
pressure switches have detected an abnormality in the
refrigerant regulation. The sensors are malfunctioning due to not enough
refrigerant in the heat pump.
Contact the after-sales service.
E08
The connection between the control box and the heat pump is not working.
Solution:
-Make sure the control wires are connected to the electronic board in place:
"12V brown wire - NET blue wire - GND green & yellow wire"
-Check the connection of the remote command wire connection
If this does not resolve the fault, replace the control box
P01
Fault in the water inlet temperature sensor.
Solution:
-Check the calibration of the water inlet and outlet valves
-Make sure the sensor wires are connected to the electronic board
-Check that the sensor is correctly installed on the hydraulic heat exchanger
-Check the condition of the sensor, make sure that the cable is not damaged
or cut
after the checks, if the error code remains set, replace the sensor
P02
Fault in the water outlet temperature sensor.
Solution:
-Check the calibration of the water inlet and outlet valves
-Make sure the sensor wires are connected to the electronic board
-Check that the sensor is correctly installed on the hydraulic heat exchanger
-Check the condition of the sensor, make sure that the cable is not damaged
or cut
after the checks, if the error code remains set, replace the sensor
