Error code Description
troubleshooting
1E0
EEPROM error - main board
2E0
EEPROM error - inverter A module
3E0
EEPROM error - inverter B module
E1
phases sequence - control from main board
The three phases must be present at the same time
and offset by 120°Restoring the power supply clears
the error.Note: the power supply is checked only in
the initial switch-on phase. It is not controlled when
the unit is in operation.
E2
communication error between main board
and keypad
If an error occurs between the wired controller and
the master unit module, all of the slave units stop.
If an error occurs in a slave unit (between the
master unit and a slave unit), the slave module with
the transmission error stops. The number of
controlled units on the wired controller is reduced,
the wired controller displays EC and the wired
controller indicator flashes.The error is eliminated
after the transmission has been restored. If an error
occurs between slave units, both units stop. The
master unit and the previous slave units are not
E3
“Total” outlet water temperature probe Tw
fault
(only for master unit)
Only the master unit controls the sensor fault, the
slave unit does not control it.When the number of
units in line is 2 or more, check if the Tw sensor is
faulty or is not required.When the number of units
in line is 1, Tw = Two by default; check if the Tw
sensor is faulty or is not required.
E4
outlet water temperature probe Two fault
E7
room temperature probe T4 fault
E8
phases sequence
It is controlled continuously. If the protection occurs
on the master unit, all of the units stop and reset
automatically. If the protection occurs on a slave
unit, it stops and resets automatically, the master