Ariston SGA OPTIMA V X 160 Instructions Pour L'installation Et L'entretien page 40

GB
TECHNICAL ASSISTANCE
In the case of a fault, abnormal operation or in general, checks on the heater, call our autho-
rised and qualifi ed SERVICE CENTRE in your area. Use only original spare parts and make
sure that only qualifi ed personnel carry out their replacement.
NOTE:
The appliance is protected against malfunction by means of internal checks perfor-
med by the controller, which executes a safety shutdown if necessary. There are two
types of safety shutdown: volatile and non-volatile:
- "volatile" he shutdown is reset as soon
as its cause is eliminated. As soon as the
cause of the shutdown is eliminated, the
appliance starts up again and continues to
operate normally.
EXTRA FUNCTIONS
The electronics on the water heater allow many extra functions that are available during heater
operation and come under two headings:
• special safety functions
• special service functions
SPECIAL SAFETY FUNCTIONS
These functions are always active when the heater is connected to the electrical supply.
They regard all those controls that off er active safety protection to the heater:
a. NTC temperature sensor failure
If the tank's internal temperature sensor malfunctions, the controller detects the fault and
shuts down the appliance (red "
b. Over-temperature
If for any reason the water heater temperature exceeds +87°C, the controller will detect the
fault, and the safety thermostat will shut down the appliance (red "
remains in operation to facilitate the cooling of the unit. Contact a specialised technician.
c. Flue gas exhaust protection
If for any reason the fl ue is blocked, a safety thermostat trips and shuts down the appliance
(red " " led on) contact a specialised technician.
d. Dry run protection
"Dry run protection". The tungsten electrode (also used for the anode function), located at
the top of the tank, detects the fact that the tank is partly empty and shuts down the heating
function. The fault is reported by the red "
To restore operation, remove the blockage.
40
- "non volatile" the shutdown is not reset
automatically; you must press the red con-
trol panel button to reset it. If this type of
shutdown occurs frequently, contact an au-
thorised Service Centre for assistance.
" led on) contact a specialised technician.
" ed on (see diagnostics table).
" led on) and the fan