Heat pump water heater - OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
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P19 parameter - Errors
This is a read-only parameter that shows the history of the last 10 errors; it is accessible only by the technical
assistance. The number (3 digits) indicates the occurred error code whilst the error number is represented in the lower
string in chronological order (max 10 errors - the number 10 indicates the most recent occurred error).
7.8 Anti-frost function
When the product is supplied with power and there is no hot water demand, if the water temperature in the tank goes
below 5°C, the heater coil (1000 W) is activated automatically to heat the water to 16°C. With P8=3 the function is
performed by the integrated circuit.
7.9 Defrost
The defrost function is activated when the heat pump has been working for at least 20 minutes, the
detected air temperature is below 15°C and the evaporator temperature is decreasing rapidly. When the
defrost cycle is running, the icon to the side is displayed.
7.10 Number of showers available
The icon to the side shows the estimated number of showers remaining, based on hot water availability.
One shower is calculated as: 40 L at 40°C. Press the knob to view the value.
7.11 Errors diagnostics
As soon as a fault occurs, the appliance enters into the fault mode while the display emits flashing signals and
visualises the error code. The water heater will continue supplying hot water provided the fault affects only one of two
the heating units, by activating the heat pump or heating element.
If the fault involves the heat pump, the symbol "HP" will flash on the screen, while the heating element symbol will
flash if the fault involves this component. If both components are affected, both symbols will flash.
If the product shows an error signal, switch the appliance off and then on with the ON/OFF button (without batteries); if
the error signal persists, contact the technical assistance.
CAUTION: Before intervening on the product by following the indications below, check the correct
electrical connection of the components to the mainboard and the correct position of the NTC sensors in
their seats.
Error
code
Cause
Heating element
operation
Heat pump
operation
What to do
Encoding of heat pump circuit codes
110
Air/Evaporator/Intake NTC
sensor; short circuit or open
circuit
ON
OFF
Replace the component
111
Air/Evaporator/Intake NTC
sensor: decalibration
ON
OFF
Replace the component
121 No coolant (R134a)
ON
OFF
Recover the residual gas, find the leak in the cooling
circuit and repair it; empty the cooling circuit and
recharge with 1300 grams of coolant
131
Compressor start capacitator:
KO
ON
OFF
Replace the start capacitator
If the error persists, recover the residual gas and replace
the compressor; empty the cooling circuit and recharge
with 1300 grams of coolant
141 Fan: KO
ON
OFF
Replace the component
142 Evaporator filter: obstruction
ON
OFF
Clean the evaporator filter and the air ducts
If the error persists, check compliance of the air duct
specifications
143
High pressure drop in air
ducts
ON
OFF
Check compliance of the air duct specifications
If the error persists, clean the evaporator filter and the
air ducts
151
Pressure switch:
decalibration
OFF
OFF
Replace the component
If the error persists, download 300 gr. of R134a
refrigerant gas from cooling circuit.
