Anti-Freeze; Defrost; Errors - Ariston Wi-Fi Manual

Hybrid electric water heater (WiFi model) – OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
7.13

Anti-freeze

If the water temperature in the tank drops below 5 °C when the product is powered, the heating element (1200 W) is
activated automatically to heat the water to 16 °C.
7.14

Defrost

This function allows the evaporator to thaw, switching the heat pump OFF and the keeping the fan ON.
7.15

Errors

The errors which may occur during operation can be volatile (if the error condition does not re-occur) or non-volatile
(they must be restored with a manual reset or the intervention of the technician).
As soon as a fault occurs, the appliance enters into the fault mode, the ON/OFF key flashes and the display shows the
error code. The water heater will continue supplying hot water provided the fault affects only one of two the heating
units, by activating the heat pump or heating element.
Whenever the product displays an error message, switch the appliance OFF and then ON using the ON/OFF
key; if the error message re-occurs, contact the technical assistance service.
WARNING: Before taking any action on the product, following the instructions below, ensure the electrical
connection between the components and the motherboard is correct and the positioning of the NTC probes
in their respective housings is correct .
Before each maintenance operation: carefully read the inspection procedures explained in the Technical Manual
Error
Cause
code
NTC air temperature sensor:
09
short circuit or open circuit
NTC Evaporator temperature
10 sensor: short circuit or open
circuit
NTC sensor issue
11
Air/Evaporator temperature
21 Refrigerant issue
141 Fan issue
NTC sensor high (hot water):
218
short circuit or open circuit
Medium/low NTC sensor
230 (heating element zone): short
circuit or open circuit
Heating
Heat pump
element
operation
operation
Pump circuit codes key
ON
ON
ON
ON
ON
Domestic hot water circuit codes key
ON
OFF
59
What to do
Press the ON/OFF key twice and
check to see if the error re-occurs.
OFF Check and, if necessary, fix the air
sensor assembly. If the error
reappears, replace the sensor
Press the ON/OFF key twice and
check to see if the error re-occurs.
Check and, if necessary, fix the
OFF
evaporator
assembly. If the error reappears,
replace the sensor
Press the ON/OFF key twice and
check to see if the error re-occurs.
Check and, if necessary, fix the
OFF
evaporator
assembly. If the error reappears,
replace the sensor
Check the
Evaporator sensor and the fan. Check
OFF
for any loss of refrigerant using a
sniffer
Check the ventilator to ensure it is
correctly assembled and the electrical
OFF
connections are correctly wired. If the
fan does not work, replace it
OFF
Check, and if necessary correct, the
sensor connection to the main circuit
board. If the sensor does not work,
OFF
replace it
temperature sensor
temperature sensor
operation of the