64 RLM 4GB
Fault code Cause Remedy
CN038: Battery The rechargeable battery is
flat:
Loop of the boundary cable
is too long, too many islands.
Correct the location of the boundary ca-
ble.
When charging, no contact to
the charging contacts
■
Clean the charging contacts.
■
Place the appliance in the charging
station and check that the charging
contacts make contact.
■
Have the charging contacts checked
and replaced by a Kärcher service
centre.
Obstacles close to the
charging station
Remove the obstacles.
The appliance has got stuck. Place the appliance on the free, desig-
nated grass surface.
The appliance does not find
the charging station.
■
Check the boundary cable for dam-
age.
■
Have the boundary cable measured
by a Kärcher service centre.
The rechargeable battery is
depleted.
Have the rechargeable battery replaced
by a Kärcher service centre.
The charging electronics are
faulty.
Have the charging electronics checked
by a Kärcher service centre.
CN099: Recov escape Automatic fault rectification
not possible
■
Manually acknowledge the malfunc-
tion message.
■
If the fault reoccurs: Have the appli-
ance checked by a Kärcher service
centre.
CN104: Battery over
heating
■
Rechargeable battery
has overheated (more
than 60°C). No dis-
charging is possible.
■
Emergency switch-off by
monitoring electronic
control unit
■
Switch off the appliance and let the
rechargeable battery cool down.
■
Do not place the appliance on the
charging station.
CN110: Blade motor
over heating
Mowing motor has overheat-
ed (more than 80°C).
■
Switch off the appliance and let it
cool down.
■
If the fault reoccurs: Have the appli-
ance checked by a Kärcher service
centre.
CN119: R-Bumper de-
flected
CN120: L-Bumper de-
flected
The appliance has moved
onto an obstacle and cannot
free itself.
Remove the obstacle.