Page 50 from 56 6-720-821-364 SM HP270 – 250 - 200 2016/12 en
Code E10 – Lock Out Error (reset by pressing OK for more than 3 sec)
Fault in the E-heater (detection by the current sensor in control unit: I < 6A)
The Thermostat is switching off
before HP reach set point
Ensure thermostat is in maximum
position (aprox. 80ºC). Temperature
selector blocked in máx.
Thermostat with wrong
calibration / Defective
Thermostat
Refer to spare part list
and replace thermostat
The Thermostat is not switching
on the electrical heater element
Thermal Cut out activated (safety
thermostat) due to over temperature
Reset thermostat manually
Possible defective E-
Heater – Measure
resistance (27 Ω)
In case of HP with coil
connected to solar
ensure máx set point in
solar control of 70ºC
In case of need, drain tank and
clean E-heater, ensuring that
thermostat pocket is not
touching heating element
Inspect reason for over-
temperature activation
Refer to spare part list
and replace it
Ensure NTC top is
fully inserted
Attention: low water flow during LEG cycle due
to obstruction (scaling / fouling) in tank hose
adaptors and wrong bottom sensor position may
lead to overheating in tank
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