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ERROR CODE AND TROUBLESHOOTING
When a safety device is activated, an error code will be displayed on the user interface.
A list of all errors and corrective actions can be found in the table below.
Reset the safety by turning the unit OFF and back ON.
In case this procedure for resetting the safety is not successful, contact your local dealer.
Error
code
Malfunction or protection Failure cause and Corrective action
E0
Flow switch error(E8 displayed
3 times)
1.The wire circuit is short connected or open.
Reconnect the wire correctly.
2.Water flow rate is too low.
3. Water flow switch is failed, switch is open or close continuously, change the water
flow switch.
E1
Phase sequence fault (only for
three-phase unit)
1.Check the power supply cables should be connected stable, to avoid phase loss.
2.Check the power supply cables sequence, change any two cables sequence of the
three power supply cables.
E2
Communication error between
wired controller and unit
1.wire doesn’t connect between wired controller and unit. Connect the wire.
2.Communication wire sequence is not right.
Reconnect the wire in the right sequence.
3. Whether there is a high magnetic field or high power interfere, such as lifts, large
power transformers, etc..
To add a barrier to protect the unit or to move the unit to the other place.
E3
The backup heater exchanger
outlet water temperature sensor
(T1) error
1. The T1 sensor connector is loosen. Reconnect it.
2.The T1 sensor connector is wet or there is water in. Remove the water, make the
connector dry. Add waterproof adhesive.
3.The T1 sensor failure, change a new sensor.
E4
The domestic hot water tempe-
rature sensor (T5) error
1.The T5 sensor connector is loosen. Reconnect it.
2.The T5 sensor connector is wet or there is water in. Remove the water, make the
connector dry. Add waterproof adhesive.
3.The T5 sensor failure, change a new sensor.
E5
The condenser outlet refrige-
rant temperature sensor (T3)
error.
1. The T3 sensor connector is loosen. Reconnect it.
2.The T3 sensor connector is wet or there is water in. Remove the water, make the
connector dry. Add waterproof adhesive.
3. The T3 sensor failure, change a new sensor.
E6
The outdoor air temperature
sensor (T4) error.
1. The T4 sensor connector is loosen. Reconnect it.
2.The T4 sensor connector is wet or there is water in. Remove the water, make the
connector dry. Add waterproof adhesive.
3. The T4 sensor failure, change a new sensor.
E8 Water flow failure
Check that all shut off valves of the water circuit are completely open.
1 Check if the water filter needs cleaning.
2 Refer to "9.4 Charging water"
3 Make sure there is no air in the system (purge air).
4 Check on the manometer that there is sufficient water pressure. The water pressu-
re must be >1 bar.
5 Check that the pump speed setting is on he highest speed.
6 Make sure that the expansion vessel is not broken.
7 Check that the resistance in the water circuit is not too high for the pump (refer to
"Setting the pump speed" ).
8 If this error occurs at defrost operation (during space heating or domestic water
heating), make sure that the backup heater power supply is wired correctly and that
fuses are not blown.
9 Check that the pump fuse and PCB fuse are not blown.
E9 Suction pipe sensor (Th) error
1. The Th sensor connector is loosen. Re connect it.
2.The Th sensor connector is wet or there is water in. Remove the water, make the
connector dry. Add waterproof adhesive.
3. The Th sensor failure, change a new sensor.
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