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13.4 Error codes
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.
Malfunction or
Error code
protection
Flow switch error
(E8 displayed 3
times)
Phase sequence
fault(only for three-
phase unit)
Communication
error between
user interface and
main control board
of hydraulic module
The backup heater
exchanger outlet
water temperature
sensor（ T1） error.
Failure cause and Corrective
action
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.
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.
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.
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.
52
Malfunction or
Error code
protection
The domestic hot
water temperature
sensor （ T5） error.
The condenser
outlet refrigerant
temperature sensor
(T3)error.
The ambient
temperature sensor
(T4) error.
Water flow failure
Failure cause and Corrective
action
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.
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.
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.
Check that all shut off
valves of the water
circuit are completely open.
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
(purge air).
in the system
(purge air).
4 Check on the
manometer that there is
sufficient water pressure.
The water
pressure must be >1 bar.
pressure 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.
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.
that fuses are not blown.
9 Check that the pump
fuse and PCB fuse
are not blown.
V.2
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