Anti-Bacteria Function; Default Settings; Reset / Diagnostics - Ariston Heat pump water heater User Manual

Heat pump water heater

4.8 Anti-bacteria function

The electronic control of the NUOS water heater automatically runs the anti-bacteria function, which consists in a water
heating cycle at 65°C for the duration necessary to avoid germs from developing in the water tank and piping. The
first cycle begins 3 days after the product is switched on. Subsequent cycles are performed every 30 days (provided
the water has not been brought to 65°C at least once during the same period of time). When the product is switched
off, the anti-bacteria function is disabled.
To deactivate/activate this function, press the "MODE" button and hold for 3 seconds while the appliance is operating.
Set "Ab 0" (to deactivate the function) or "Ab 1" (to activate the function) using the "SET" knob and confirm the setting
by pressing the same knob. The function is deactivated/activated when the product returns to the normal operating
mode.
The ECO HP (4) button flashing while "Ab" appears on the DISPLAY (10) signals that the anti-bacteria protection cycle
is running.

4.9 Default settings

The appliance is manufactured with a series of default modes, functions or values, as indicated in the table below:

4.10 Reset / Diagnostics

In the event of a malfunction, the appliance starts operating in the malfunction mode and the error code appears on
the display in the form of flashing digits (e.g. E01).
The error codes include the following:
E01 – E02 – E03 – Water overheating.
E10 – E11 – E12 – E13 – E16 – NTC sensors malfunction (faulty water heater sensors).
E04 – Operation without water.
E60 – E90 – E91 – E92 – PCB software error.
E30 – E31 – E32 – E33 – NTC sensors error (faulty heat pump sensors)
E34 – E43 – E44 – E45 – E46 – Heat pump operation error
Reset: to reset the appliance, turn it off then on again using the ON/OFF (1) button. The appliance will start operating
regularly again if the cause of the fault has disappeared during the reset. If the problem has not been solved, the error
code will continue to appear on the display; the aid of the Technical Assistance Centre is required.
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Parameter
MANUAL
ECO HP
FAST
TEMPERATURE
SHOWER TIME
ANTI-BACTERIA
FUNCTION
Default setting
on
on
off
55°C
P1 = 7 am / P2 = 7 pm
disactivated