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19. Troubleshooting and maintenance
Error code on
the display
Battery symbol
(
)
F1
F2
F3
F4
Antenna symbol
(
) flashing
slowly
Antenna symbol
(
) flashing
fastly
CAL
Problem
Battery voltage
too low
Valve drive
sluggish
Actuating range
too wide
Actuating range
too narrow
A MAX! Cube
or MAX! Wall
Thermostat has
already been
taught-in
Connection to
taught-in MAX!
Components lost
Duty cycle has
been exceeded
Routine descaling
is active
Solution
Replace batteries
Check the installation; check
whether the pin on the
heating valve is stuck
Check the fastening of the
actuator
Check the heating valve;
check whether the valve pin
is jammed
Make sure that the device
is not taught in to the MAX!
Cube (in the software) or
the MAX! Wall Thermostat
and reset the device. You
can repeat the teach-in
procedure afterwards.
Check the power supply and
batteries to taught-in MAX!
Components
The longest period to wait
before sending again would
be an hour
Automatic function, see the
section 14.5.
89
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