BMW R1200RT Rider's Manual page 37

On-board system voltage
low
appears on the display.
Generator power is only just
sufficient to supply all consumers
and charge the battery.
Possible cause:
Too many consumers switched
on. On-board system voltage
tends to drop particularly at low
engine rpm and when the engine
is idling.
When riding at low engine
rpm switch off all consumers
that are not necessary for
road safety (e.g. heated body
warmer or auxiliary headlights).
On-board system voltage
critical
lights up yellow.
appears on the display.
Generator power is no longer
sufficient to supply all consumers
and charge the battery. In order
to ensure that the engine can
be started and the motorcycle
ridden, the on-board electronics
switch off the electricity supply
to the on-board sockets and the
auxiliary headlights. In extreme
cases the seat heating and the
grip heating might also be shut
down.
Possible cause:
Too many consumers switched
on. On-board system voltage
tends to drop particularly at low
engine rpm and when the engine
is idling.
When riding at low engine
rpm switch off all consumers
that are not necessary for
road safety (e.g. heated body
warmer or auxiliary headlights).
Insufficient battery charge
current
lights up red.
appears on the display.
A discharged battery can
render various systems un-
available, for example the lights,
the engine or the ABS. This can
result in dangerous situations.
Do not continue your journey.
Battery is not being charged. If
you continue to ride the motor-
cycle the on-board electronics
will drain the battery.
Possible cause:
Alternator or alternator drive de-
fective.
Have the fault rectified as
quickly as possible by a
specialist workshop, preferably
an authorised BMW Motorrad
dealer.
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