Husqvarna Automower 420 Technical Manual page 90

503 Electronics problem
504 Electronics problem
505 Electronics problem
Charging station
17
Charging station
blocked
16 Stuck in charging sta-
tion
37 Charging current too
high
26 Invalid sub-device
combination
Messages without error codes
N/A Needs manual
charging
N/A Wrong PIN
N/A Next start hh:mm
English - 90
6. TROUBLESHOOTING
Keyboard problem
Display problem
The parameter for the type of
robotic lawnmower is different
in the HMI circuit board and
main circuit board.
An object is obstructing the
robotic lawnmower.
Charging station antenna plate
bent.
The contact between the char-
ging strips and contact strips
may be poor and the robotic
lawnmower has made a num-
ber of charging attempts.
There is an object in the way
of the robotic lawnmower,
preventing it from leaving the
charging station.
The robotic lawnmower slides
on the charging station's an-
tenna plate.
The battery is being charged
with too high a current.
The robotic lawnmower is set
to the Secondary area opera-
ting mode.
Wrong PIN code has been
entered. Five attempts are
permitted, and the keypad is
then blocked for five minutes.
The timer setting prevents
the robotic lawnmower from
operating.
The robotic lawnmower's clock
is incorrect.
Make sure the cable between the
HMI circuit board and the keypad is
properly connected.
Replace the keyboard. Refer to
5.11 Replacing the keypad on page 68.
Change HMI circuit board
Change HMI circuit board
The parameter can only be entered
during the initial programming of
the main circuit board. It can not be
changed afterwards. Replace the
main circuit board and ensure that the
correct robotic lawnmower model is
selected.
A used HMI circuit board can be used
only if it has previously been fitted to
the same type of robotic lawn mower.
Therefore, it is not possible, for
instance, to use an HMI circuit board
in a Husqvarna 420 if it has previously
been fitted to a 430.
Remove the object.
Make sure the charging station is situ-
ated level.
Dock the robotic lawnmower in the
charging station and check that the
charging strips and contact strips
make good contact.
Remove the object.
Clean the antenna plate.
Fault in power supply or wrong type
of power supply alternatively charging
station is being used.
Program the mower with the most re-
cent main program. Refer to
4.3.4 Programming on page 49.
Place mower in charging station. This
behavior is normal and no further ac-
tion is required.
Enter the correct PIN code. Contact
the local dealer if you forget the
PIN code.
Change the timer settings.
Set the time.