61
TROUBLESHOOTING
E3, E4, Ed, H3, H5, HA, H9, Ec, E7
Description
E3 indicates a backup electric heater water outlet temperature sensor error (T1)
E4 indicates a domestic hot water tank temperature sensor error (T5)
H3 indicates a water side exchanger refrigerant inlet (liquid pipe) temperature sensor error (T2)
Ed indicates a water side heat exchanger water inlet temperature sensor error (Tw_in)
HA indicates a water side heat exchanger water outlet temperature sensor error (Tw_out)
H5 indicates an ambient temperature sensor error (Ta)
H9 indicates a low temperature circuit water outlet temperature sensor error (T1B)
Eb indicates a solar option temperature sensor error (Tsolar)
E7 indicates an inertial tank temperature sensor error (Tbt1)
Ec indicates an additional DHW tank temperature sensor error (T5_2/Tbt2)
The unit shuts down.
The error code is displayed on the main PCB and user interface.
Possible causes
Temperature sensor not connected properly or is malfunctioning.
Main PCB is damaged.
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