Honda EXT12D Maintenance Manual page 18

Charge Warning Lamp
When the engine switch is turned to ON position, the charge warning
lamp lights for approximately 4 seconds to indicates the glow plug is
being preheated.
The warning lamp will go off when the engine switch is turned to
START position even within 4 seconds.
The warning lamp lights again approximately 15 seconds after the
engine is stopped with the engine switch set to ON position.
The warning lamp lights and engine will stop when the following
occurs during operation:
− Faulty battery charging system.
− No fuel
− Engine trouble
See your authorized Honda dealer if the warning lamp lights even
though the fuel is sufficient.
CHARGE WARNING LAMP
18