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16. 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
or MAX! Wall
The has
already been
taught-in
Make sure that the device
is not taught in to the MAX!
Cube (in the software) or
the MAX! Wall The
and reset the device. You
can repeat the teach-in
procedure afterwards.
Antenna symbol
( ) flashing
slowly
Connection to
taught-in MAX!
Components lost
Check the power supply and
batteries to taught-in MAX!
Components
Antenna symbol
( ) flashing
fastly
Duty cycle has
been exceeded
The longest period to wait
before sending again would
be an hour
CAL
Routine descaling
is active
Automatic function
