Tayana -48 Owner's Manual page 21

Normally the main engine and generator will start by individual
battery. In case the battery is low, turn on the parallel switch and
parallel both banks of batteries. A legend is located next to the
switches for your convenience.
！
DO NOT TURN OFF EITHER ISOLATOR SWITCH
WHILE ENGINES ARE RUNNING
Battery Select Switch
!
TO AVOID SERIOUS DAMAGE TO THE ALTERNATORS OR
LOSS OF CONTROL CIRCUIT FUNCTIONS INCLUDING
SHUTDOWN, DO NOT TURN THE BATTERIES MASTER
DISCONNECT SWITCH TO THE "OFF" POSITION WHILE
THE ENGINE IS RUNNING.
WARNING!
Never work on a live electric fitting.
WARNING!
Never tamper with an electric fitting. Call in a technician
qualified in marine electricity. The batteries must be carefully
and safely stowed.
WARNING!
Never alter the specifications of the breakers, which
protect against overload.
WARNING!
20