Ariston 80L Manual Del Usuario página 55

Heat pump water heater – OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
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).
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:
Disconnect the appliance from the mains.
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Close the shut-off valve, if installed, or the central tap of the domestic water supply network.
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Open the hot water tap (washbasin or bathtub).
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open the cock on the safety device (in countries which acknowledge EN 1487) or the special cock installed on
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the "T" fitting, as described in paragraph 4.7.
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 grid casing;
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 (1.6 mm).
Still on external unit, ensure that the condensate water runs out in a suitable drain and make sure the discharge is
made without hindrance.
Use only original spare parts.
After routine or extraordinary maintenance, we recommend filling the appliance's tank with water and draining it
completely to remove any residual impurities.
8.3 Troubleshooting
Problem Possible reason
Low temperature set
Device functioning errors
No electrical connection, disconnected or
damaged wirings
P8 HC/HP signal parameter ON
Water comes
out cold or
Malfunctioning of the timer for two-tier rate (if the
insufficiently
product is installed in this configuration)
warm
Funcioning in "Voyage" mode
Product off
Usage of a large amount of hot water when the
product is heating up phase
Sensor error
The water is
boiling (with
High level of scaling of the boiler and
the possible
components
presence of
steam from
the taps)
Sensor error
Reduced
Air temperature out of range
functioning of
"Time W" value too low
the heat
pump, semi-
Installation done not in accordance with electric
permanent
voltage (too low)
operation of
Evaporator clogged or frozen
the electrical
What to do
Increase the temperature set for the outlet water
Check for errors on the display and act in the way specified
on the chart "Faults"
Check the voltage at the supply terminals, verify the
integrity and connections of the cables.
Keep parameter P8 OFF
Check the operation of the contactor day / night and that
the set time is enough to heat water
verify is not the programming period "Voyage", in that case
deactivate the function
Check availability of electricity, turn on the product
Control the presence, even if occasional E5
Turn off the power, drain the unit, remove the sheath of the
resistance and remove lime scale inside the boiler, be
careful not to damage the enamel of the boiler and the
sheath resistance. Repackage the product as in the original
configuration, it is recommended to replace the flange
gasket.
Control the presence, even if occasional E5
Depending from the climatic conditions
Set a parameter for lower temperature or a longer unit of
"Time W"
Provide a proper Electric voltage
Check the cleaning of the evaporator
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