eQ-3 MAX! Radiator Thermostat, Operating Manual

Page: 30 / 68

30
17. Troubleshooting and maintenance
Error code on
the display Problem Solution
Battery symbol
(
)
Battery voltage
too low Replace batteries
F1 Valve drive sluggish Check the installation;
check whether the pin on
the heating valve is stuck
F2 Actuating range
too wide Check the fastening of
the actuator
F3 Actuating range too
narrow Check the heating valve;
check whether the valve
pin is jammed
F4 A MAX! Cube
has already been
taught-in Reset the device and
repeat the teach-in
procedure
Symbol for radio
synchronicity
flashing slowly (
)
Connection to
taught-in MAX!
Components lost Check the power supply
to taught-in MAX!
Components
Symbol for radio
synchronicity
flashing fastly ( ) Duty cycle has
been exceeded The longest period to
wait before sending
again would be an hour
LOC Operating block
activated Follow the instructions
in the section 13 to
deactivate the operating
block
CAL Routine descaling
is active Automatic function, see
the section 16