Modena Casella Series, User Manual Book

Page: 31 / 42

31

Anti-freezing Protection Function
When in the non-heating state, if the water temperature in the
water heater is less than or equal to 6 °C, connect the appliance to
the corresponding heating tube to conduct heating. The water
heater could stop heating when the temperature reaches 10 °C
(heating is not displayed, i.e., hidden heating).

Factory Setting Function
When in the power off state, if “ ”and “ ” buttons are pressed
for 3s simultaneously, the display screen will be fully bright; system
will enter into the factory setting mode (buzzer will ring, if any);
then, the system will enter into “heating/heat preservation” state
after 2s. The factory setting parameters are shown in the following
table.
User Setting Temperature 70 °C
Timer Reservation (Booked Time) 8 Hours
Reservation Mode Unlock by default

Alarming Function and Self Problem Detection (Not Available in
Empty-Shell Machine)
If there is a problem due to several cases (such as dry-heating,
over-temperature and sensor turn off the heating device or short
circuit), nixie tubes on the display screen successively show E2, E3
and E4 with blinking display. All other nixie tubes and the indicator
lights will not show signs. For instance, if there is a buzzer, it will
give six short alarms. At this moment, all relays are switched off
and all buttons do not work. After the problems are solved and
electricity is connected again, the water heater will recover to the
power-off state. In the
power-on state, the system will
automatically conduct self-inspection. If there is a problem, the
corresponding error code will be displayed accordingly, and the
system cannot work (i.e. the water heater is unable to start.)