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Heat pump water heater – OPERATING AND MAINTENANCE INSTRUCTIONS FOR THE USER
Error
Cause
code
Heating occurs without any
E1
water in the water tank
Excessive temperature of the
E2
water in the tank
Fault during heating with the
E3
heating element
Sensor fault – heating element
E4
zone
Excessive difference between
E5
the temperatures of the heating
element zone sensors
Excessive pressure in the
H1
refrigeration circuit, or faulty
reading on the pressure switch
H2
Fan fault
H3
Compressor fault
H4
Evaporator obstructed
H6
Air sensor fault
H7
Evaporator sensor fault
H8
Hot water pipe sensor fault
H9
Active defrost fault
F1
PCB fault
Excessive number of ON/OFF
F2
(RESET)
Lack of communication
F3
between the PCB and interface
Empty tank (EMPTY),
F4
impressed current anode circuit
open
Short-circuit on the impressed
F5
current anode circuit
All manuals and user guides at all-guides.com
Heating
element
operation
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
OFF
ON
ON
ON
ON
Heat pump
operation
Verify the causes of the lack of water (leakage, faulty
OFF
Turn the appliance off then on again; if the problem
ON
persists, contact the technical assistance service
ON
Verify that the heating element functions properly
Check or replace the heating element zone sensors, if
ON
ON
Check or replace the sensors, if necessary
Try restarting the machine; if the error persists, contact
OFF
the technical assistance service
Check that the fan is not broken and that the evaporator
is not obstructed. Check whether the hot gas valve
OFF
functions properly and replace it if necessary. Check the
perfect cleaning of grids and ducts
Verify whether the compressor functions properly and/or
OFF
check for any refrigerant gas leakages
OFF
Check the perfect cleaning of grids and ducts
Verify whether the sensor is properly connected and
OFF
positioned, and replace it if necessary
Verify whether the sensor is properly connected and
OFF
positioned, and replace it if necessary
Verify whether the sensor is properly connected and
OFF
positioned, and replace it if necessary
Check that the fan is not broken and that the evaporator
is not obstructed. Check whether the hot gas valve
OFF
functions properly and replace it if necessary. Check the
perfect cleaning of grids and ducts
Try turning the appliance off then on again and verify
OFF
the operation of the control boards, if necessary
ON
Temporarily disconnect the product and the batteries
Try turning the appliance off then on again and verify
ON
the operation of the control boards or replace them, if
Verify whether there is any water in the tank, check or
ON
replace the impressed current anode, if necessary
Check or replace the impressed current anode if
ON
68
What to do
hydraulic connections, etc.)
necessary
necessary
necessary
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