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Warnings Warranty Use Servicing
20
4. Troubleshooting
󰀨
󰀨
4.1. Error code indications
Interrupt the alarm signal by pressing OK. When the defect is corrected, the error mes-
sage reappears for a last acquittal.
Code
shown Cause Consequences Troubleshooting
Err
W.3
Immersion sensor
() defective
or outside the meas-
uring range (

85° C).
Unable to read the
water temperature:
no heating: no
heating.
Check for connection and cor-
rect positioning of the sensor
(immersion sleeve).
Check resistor.
If necessary, replace the sensor
Err
W.7
The tank has no
water or the ACI
interface is open.
No heating. Fill the tank with water.
Check the ACI circuit (

).
Err

Water too hot
().
Risk of activating the
mechanical safety
device: no heating.
Check the connections.
Compare the sensor’s meas-
ured value to the water
temperature.
Ensure the electric heating ele-
ment has not been activated in
continuous operation.
Reset the mechanical safety if
necessary.
Err W.
11
󰀨

Check the wiring the transmis-
󰀨
Change the activation settings.
Err
W.13
Poor radio
connection
Cannot connect to
the appliance
Ensure the Cozytouch-box has
been switched on and is located
close to the water heater.
Err
W.15
Date/Time not set Cannot connect to
the appliance
󰀨
Repair work should only be performed by a professional.
22


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