Van's Aircraft RV-12 Pilot Operating Handbook page 22

Revision:3
GENERATOR/ELECTRICAL FAILURE
Electrical fuel pump operation depends upon sufficient battery
power. Monitor the fuel pressure provided by the mechanical
engine driven pump if the electrical pump has been shut off using
the master switch or fuel pump fuse.
A generator failure is indicated by a steady discharge on the
ammeter and voltage indication less than 12.0 volts.

Turn OFF all non-essential electrical equipment to conserve
battery power. The avionics switch should be switched off
and the EFIS and GPS will continue to operate on their
internal batteries.

Land as soon as possible as the battery will furnish electrical
power for a limited time only.
A voltage in excess of 15 volts indicates a runaway generator.

Turn Master OFF

Pull the 30A main bus fuse immediately.

Turn OFF all non-essential electrical equipment to conserve
battery power. The avionics switch should be switched off
and the EFIS and GPS will continue to operate on their
internal batteries.

Land as soon as possible as the battery will furnish electrical
power for a limited time only.
RV-12 PILOT'S OPERATING HANDBOOK
Date:12/03/14
WARNING
D-180 3-5