Heat pump water heater - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
106
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.
Absence of HC/HP signal (if the product is installed
with the HC/HP signal cable)
Try to put the product in “Boost” mode, if is ok in this way,
check the connection of the meter, check the integrity of the
HC/HP cable.
Malfunctioning of the timer for two-tier rate (if the
product is installed in this configuration)
Check the operation of the contactor day / night and that the
set time is enough to heat water.
Insufficient air flow to the evaporator.
Clean the grilles and ducts regularly.
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.
Probe 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 original
configuration, it is recommended to replace the flange gasket.
Probe 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
Check the cleaning of the evaporator.
Problems with the heat pump circuit
Make sure that there are no errors on the display.
Are not yet past 8 days by:
-First Time instalation.
-Change of the parameter Time-W.
-No power from mains in absence of batteries or exhausted batteries.
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 the deflector pipe, the integrity of incoming
cold water pipe and 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!
Increase of the
noise
Presence of obstructive elements inside
Check the components in movement, clean the fan and the
other parts who can generate noise or vibrations.
Components vibration
Check the components fixed with screws, be sure that the
screws are tight.
Problems of
visualization or
display off
Damage or disconnection of the wiring connecting
electronic board and interface board
Check the integrity of the connection, check the operation of
electronic boards.
No power from mains in absence of batteries or
exhausted batteries.
Check if there is electric mains supply and check the conditions
of the batteries.
Bad odor
coming from
the the
product
Absence of a siphon or siphon empty
Provide a siphon, with the proper quantity of water.
Abnormal or
excessive
Loss or partial obstructions of the refrigerant
circuit
Start your product in heat pump mode, use a leak detector
for R134a to verify that there are no leaks.
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