Heat pump water heater – OPERATING AND MAINTENANCE INSTRUCTIONS
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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.
-
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, 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.
Use only original spare parts.
8.3 Troubleshooting
Problem
Possible reason
What to do
Water comes
out cold or
insufficiently
warm
Low temperature set
Increase the temperature set for the outlet water
Device functioning errors
Check for errors on the display and act in the way specified on the chart
"Faults"
No electrical connection, disconnected
or damaged wirings
Check the voltage at the supply terminals, verify the integrity and connections
of the cables.
Insufficient air flow to the evaporator
Clean in regular basis the evaporator, grids and ducts
Functioning in “Voyage” mode
verify is not the programming period "Voyage", in that case deactivate the
function
Product off
Check availability of electricity, turn on the product
Usage of a large amount of hot water when the product is heating up phase
Sensor error
Control the presence, even if occasional E5
The water is
boiling (with
the possible
presence of
steam from
the taps)
High level of scaling of the boiler and
components
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 origin
configuration, it is recommended to replace the flange gasket.
Sensor error
Control the presence, even if occasional E5
Reduced
functioning
of the heat
pump, semi-
permanent
operation of
the electrical
resistance
Air temperature out of range
Depending from the climatic conditions
“Time W” value too low
Set a parameter for lower temperature or a longer unit of “Time W"
Installation done not in accordance with
electric voltage (too low)
Provide a proper Electric voltage
Evaporator clogged or frozen
Clean in regular basis the evaporator, grids and ducts
Problems with the heat pump circuit
Make sure that there are no errors on the display
Are not yet past 8 days by: First installation, -change of the parameter Time-W, No power from mains
P7 parameter set to OFF and outside
air temperature below 10 ° C
Set parameter P7 ON
Insufficient
flow of hot
water
Leaks or obstructions by the water
circuit
Verify that there are no leaks along the circuit, check
the integrity of the deflector pipe the inte
hot water pipe
Overflowing
water by the
the safety
valve
A drip of water by the device should be
considered normal during the heating
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!
OPERATING AND MAINTENANCE INSTRUCTIONS
WARNING! Observe the general warnings and safety instructions listed in the previous paragraphs and
ualified personnel (i.e. with the
off valve, if installed, or the central tap of the domestic water supply network.
basis in order to remove any dust or obstructions
.
heat pump casing.
not damage it. In the case you found some bended fins,
he discharge is made without
Increase the temperature set for the outlet water
Check for errors on the display and act in the way specified on the chart
Check the voltage at the supply terminals, verify the integrity and connections
Clean in regular basis the evaporator, grids and ducts
verify is not the programming period "Voyage", in that case deactivate the
ty, 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
Set a parameter for lower temperature or a longer unit of “Time W"
Clean in regular basis the evaporator, grids and ducts
Make sure that there are no errors on the display
W, No power from mains
Verify that there are no leaks along the circuit, check
deflector pipe the integrity of incoming cold water pipe and
If you want to avoid the drip, install an expansion vessel on the plant supply.
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
