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DURALIS CONNECT - Troubleshooting
Water drop indicator on
HMI display
ERR. 3
ERR. 4
ERR. 7
ERR. 10
ERR. 19
No indicator light lit
Possible cause
Water heater power supply
faulty
Safety thermostat
deactivated
Water heater operational
fault
Meaning
Probable cause of error
Fault with the
Faulty or incorrectly connected
regulation sensor
sensor
Hot water
Faulty or incorrectly connected
measurement
sensor
sensor fault
No water in the tank or ACI wire
ACI fault
connection fault
Communication
Poor cable connection or PCB
error between the
malfunction
PCBs
Temporary supply
Supply via peak/off-peak switch
error
Action to be taken
Check the water heater power supply (230
volts) using a measuring device (multimeter).
Check whether the power supply is continuous
(24/7).
Check the power supply at the outlet for the
safety thermostat(s).
Check the water heater power supply at the
PCB using a measuring device (multimeter) to
ensure it is 230 volts.
Check that the cable connecting the PCB and
control unit is correctly connected.
Repair instructions
Check the connection and replace
the regulation sensor if necessary
Check the connection and replace
the hot water measurement sensor
if necessary
Fill the water heater with water.
Check the connection of the ACI
circuit and replace the wiring
harness if necessary
Check the connection and replace
the PCB if necessary
Change the product's electrical
supply to a permanent supply.
Caution: risk of accelerated
corrosion.
Clear the error by holding the central
key for 3 seconds
Solution
If there is no power supply or the power supply
is faulty, contact an electrician
If the appliance is connected to the off-peak
hours switch, the installation is incorrect;
contact an electrician
Reactivate the thermostat safety device.
If this fault is still present, contact an installer
and the after-sales service.
If the power supply is correct, contact an
electrician to have the PCB replaced.
Reconnect the connecting cable correctly.
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