Diamond DA 40 Flight Manual page 276

Airplane
Description
Caution Messages
A caution is indicated by a momentary aural alert (sounded in the airplane's intercom
system), flashing of the amber CAUTION light, and flashing of the amber caution light
associated with the affected system.
By pressing the 'acknowledge' button, which is now illuminated green, the CAUTION light
will be extinguished. The caution light associated with the affected system will change
from flashing to solid illumination.
The LOW FUEL caution message is displayed in a slightly different manner (extended
functionality), which is described below.
Alternator Warning Message (ALTERNATOR)
The alternator warning message is displayed on alternator failure. The only remaining
source of electrical power is the battery.
The procedure to be followed upon alternator warning is given in 3.7.2 - FAILURES IN
THE ELECTRICAL SYSTEM.
Low Voltage Caution Message (LOW VOLTS)
The low voltage caution message is displayed when the on-board voltage drops below
24 Volts. It is terminated when the voltage exceeds 25 Volts again.
The procedure to be followed upon low voltage caution is given in 4B.3 - FAILURES IN
THE ELECTRICAL SYSTEM.
Page 7 - 50 Rev. 8 01-Dec-2010
DA 40 AFM
Doc. # 6.01.01-E