Low Volts Warning Light Illuminated - Cirrus DESIGN SR20 Information Manual

Cirrus Design
SR20
should be completed. Battery power must be conserved for later
operation of the wing flaps, lights, and other essential equipment.
Ammeter discharge indications and illumination of the LOW
VOLTS warning light can occur during low RPM conditions
with a heavy electrical load, such as during taxi. Under these
conditions, the master switch need not be cycled as an over-
voltage condition has not occurred and the alternator was not
de-activated. The LOW VOLTS light should go out at higher
RPM.
1. Avionics Switch ........................................................................ OFF
2. Alternator Circuit Breaker .............................................. CHECK IN
3. Alt Master Switch ................................................... CYCLE Off -On
4. Avionics Switch ..........................................................................ON
If ammeter still indicates discharge:
1. Alt Master Switch ..................................................................... OFF
2. Non-essential Electrical Equipment ......................................... OFF
3. If total power failure anticipated, Turn Coordinator Power.....EMER
4. Land as soon as practical.

LOW VOLTS Warning Light Illuminated

Illumination of the LOW VOLTS light indicates that the voltage
measured at the Essential Bus is 24.5 volts or less. Typically, this
indicates that the airplane is operating on battery power only and both
alternators have failed or are off. If both alternators have failed:
1. Land as soon as practical.
P/N 13999-002 Info Manual
September 2011
• Note •
Section 3A
Abnormal Procedures
3A-9