Ariston 240, User Manual, Page: 81 / 96

Heat pump water heater - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
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F1 PCB fault OFF OFF
Try turning the appliance off then on again and
verify the operation of the control boards, if
necessary
F2
Excessive number of
ON/OFF (RESET)
OFF OFF
Temporarily disconnect the product and the
batteries
F3
Lack of communication
between the PCB and
interface
OFF OFF
Try turning the appliance off then on again and
verify the operation of the control boards or replace
them, if necessary
F4
Empty tank (EMPTY),
impressed current anode
circuit open
OFF OFF
Verify whether there is any water in the tank, check
or replace the impressed current anode, if
necessary
F5
Short-circuit on the
impressed current anode
circuit
ON ON
Check or replace the impressed current anode if
necessary
8. MAINTENANCE (for authorized personnel)
WARNING! Observe the general warnings and safety instructions listed in the previous paragraphs
and strictly adhere to the indications therein contained.
All maintenance operations and interventions should be performed by qualified personnel (i.e. with the necessary
requirements as outlined in the applicable norms in force).
During maintenance it is advisable to wash the tank in order to remove any remaining impurities.
8.1 Draining the appliance
The appliance must be drained if left inactive in a room subject to frost.
When necessary, empty the appliance as follows:
- Permanently disconnect the appliance form the mains electricity.
-
Close the shut-off valve, if installed, or the central tap of the domestic water supply network.
- Open the hot water tap (washbasin or bathtub).
- Open the tap located on the safety valve.
8.2 Routine maintenance
It is advisable to clean the evaporator on an annual basis in order to remove any dust or obstructions.
To access the evaporator, placed on the external unit, it is necessary to remove the fixing screws of the frontal and top
cover. Verify that the external terminal of the air exhaust duct, and the duct itself, are not obstructed or have not
deteriorated.
Clean the evaporator with a flexible brush taking care not damage it. In the case you found some bended fins, straighten
them with a special comb, according to the fins spacing (1.6mm). ). Carry out the same check for the intake duct, if
present.
Ensure that the condensate water runs out in a suitable drain and make sure the discharge is made without hindrance.
Check and clean canalizations and grills.
Use only original spare parts.
After each removal is advisable to replace the gasket flange.