Maintenance; Draining The Appliance; Routine Maintenance; Troubleshooting - Ariston 80 L Manual Del Usuario

Heat pump water heater – OPERATING AND MAINTENANCE INSTRUCTIONS
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).
Use only original spare parts.

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 tap located on the safety valve.
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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, it is necessary to remove the fixing screws of the frontal heat pump 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).
Check the perfect cleaning of grids and ducts.
Ensure that the condensate water runs out in a suitable drain and make sure the discharge is made without
hindrance.
Replace the magnesium anode every two years (under penalty of warranty invalidation).
To remove this, disassemble the heating element and unscrew from the support bracket.
Loosen the 5 bolts (C, Fig. 12) and remove the flange (Z). The heating element (R) and the anode (N) are attached to
the flange. During reassembly, make sure that the flange gasket, the thermostat and the heating element are put back
in their original positions. We recommend to replace the flange gasket every time it is removed.

8.3 Troubleshooting

Problem Possible reason
Low temperature set
Device functioning errors
No electrical connection,
Water comes
disconnected or damaged wirings
out cold or
insufficiently Insufficient air flow to the evaporator
warm
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
Sensor error
the taps)
Reduced Air temperature out of range
functioning
"Time W" value too low
of the heat
Installation done not in accordance
pump, semi-
with electric voltage (too low)
permanent
Evaporator clogged or frozen
operation of
Problems with the heat pump circuit
the electrical
Are not yet past 8 days by: First installation, change of the parameter Time-W, No power from mains
resistance
Insufficient
Leaks or obstructions by the water
flow of hot
circuit
water
Overflowing
A drip of water by the device should
water by the
be considered normal during the
the safety
heating
valve
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.
Clean in regular basis the evaporator, grids and ducts
Check availability of electricity, turn on the product
Control the presence, even if occasional, of E5
Turn off the power, drain the unit, remove the resistance and remove lime scale
inside the boiler, be careful not to damage the enamel of the boiler and the sheath
resistance. Reassemble the product as in the original configuration, it is
recommended to replace the flange gasket.
Control the presence, even if occasional, of E5
Depending from the climatic conditions
Set a parameter for lower temperature or a longer unit of "Time W"
Provide a proper Electric voltage
Clean in regular basis the evaporator, grids and ducts
Make sure that there are no errors on the display
Verify that there are no leaks along the circuit, check
the integrity of the deflector pipe the integrity of incoming cold water pipe and hot
water pipe
If you want to avoid the drip, install an expansion vessel on the plant supply.
If leakage continues during the period of no heating, check the calibration of the
device and the pressure of the water network. Caution: Do not obstruct the hole
for evacuation of the device!
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