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29
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TROUBLESHOOTING
Trouble
Potential cause
What to do
Failure in the electronic
board
Power failure
Check the power supply.
Check corresponding circuit breaker.
Damaged or disconnected cable
Check the integrity (intactness) of the
electronic circuit board.
Low water temperature
or lack of hot water
Low temperature programmed
as a set point
Adjust the temperature set point.
53 °C as default factory setting.
Error activation
Check the presence of an error on the
electronic board and see the error
table.
Damaged or disconnected cable
Check the device connection to the
plug. Check corresponding circuit
breaker.
Check the integrity of cables.
Make sure the electrical cord is
connected to the power board.
Holiday mode ON
Switch off the Holiday mode.
Appliance or compressor OFF
See "5.4 System startup".
Use a large amount of hot water
For rapid heating of water, change the
device mode to "BOOST".
Hot water return into the cold
water circuit (safety device
installed incorrectly or
damaged)
Close the cold water inlet. Open the
hot water tap. Wait 10 minutes, and if
the water continues to flow, check the
function of the entire safety system.
Clean the safety device filter.
ECO mode selected and
ambient temperature very low
Change the device to the AUTO mode
to initialize the automatic control of
the system.
For rapid heating of water, change the
device mode to "BOOST".
Electrical heating OFF
Make sure that the backup electrical
heating is on.
Water is too hot or steam
generates
Problem with temperature
sensor
Check the errors displayed on the
screen.
Problem with thermal fuse
Check the correct function of the
thermal fuse.
Excessive use of electrical
heating as a backup (auto
mode)
Low ambient temperature
The operation of the device depends
on the conditions and the weather.
Low water temperature
The operation of the device depends
on the temperature of the inlet water.
Low voltage installation
Make sure that the installation is
powered by the voltage of the value
stated on the plate.
