11 Troubleshooting
11.1 Messages (Ex and Px type codes)
If a malfunction occurs, the screen displays an error code beside the water
temperature indicator:
the “ALARM” pictogram appears,
the audible signal sounds.
1. Make a note of the code displayed.
The code is important for the correct and rapid diagnosis of the type
of error and for any technical assistance that may be needed.
2. Switch off and then switch the appliance back on.
The appliance starts up again autonomously when the reason for
the disruption has been cleared.
3. If the code is displayed again, correct the problem by following the
instructions in the table below:
11.1.1 List of messages
Tab.9
Code
Description
Check / Solution
Sensor error T5 (water temperature sensor)
Check the connection between the sensor and the
PCB.
Replace the sensor.
Evaporator temperature sensor error T3.
Check the connection between the sensor and the
PCB.
Replace the sensor.
Room temperature sensor error T4.
Check the connection between the sensor and the
PCB.
Replace the sensor.
Compressor discharge TP temperature sensor error.
Check the connection between the TP sensor and
the PCB.
Replace the sensor.
Compressor intake TH temperature sensor error.
Check the connection between the sensor and the
PCB.
Replace the sensor.
Open circuit error on the immersion heater (IEH (dif
ference in current between ON and OFF on the im
mersion heater) < 1 A).
Check to ensure the immersion heater is not dam
aged and that the cables have not been incorrectly
connected after a repair.
Protection against high discharge temperatures:
Tp > 115: Protection active.
Tp < 90: Protection inactive.
Check to ensure the compressor is not damaged and
that there are no refrigerant leaks.
Check that the TP and T5 sensors are not damaged.
Protection against overloads on the compressor (ten
seconds after switching on the compressor, the cur
rent overload control starts up).
1. If the compressor is running: if the current load is
> 7 A, the compressor is shut down and the pro
tection activated.
2. If the compressor and the immersion heater are
running: if the current load is > IEH + 7, the com
pressor is shut down and the protection activated.
Load value when the compressor and the electric
water heater start up at the same time: 14 A
(1550-W electric water heater).
Check to ensure the compressor is not damaged.
Room temperature outside of the optimum operating
range.
This scenario is normal. It is not necessary to run re
pairs.
11 Troubleshooting
48
ETWH
7629886 - v07 - 20072020
