Low Alternator 1 Output - Cirrus SR20 Pilot Operating Handbook

Section 3A
Abnormal Procedures

Low Alternator 1 Output

ALT 1 Caution (Failure)
1. ALT 1 Circuit Breaker .............................................. CHECK & SET
2. ALT 1 Master Switch ........................................................... CYCLE
If alternator does not reset (low A1 Current and M1 voltage):
3. ALT 1 Master Switch ................................................................OFF
4. Non-Essential Bus Loads.................................................REDUCE
a. If flight conditions permit, consider shedding the following to
preserve Battery 1:
(1) Air Conditioning,
(2) Landing Light,
(3) Yaw Servo,
(4) Convenience Power (aux items plugged into armrest jack)
5. Continue Flight, avoiding IMC or night flight as able (reduced
power redundancy).
Amplification
Dependent on Battery 1 state (indicated by M1 voltage),
landing light may be weak or inoperative for landing.
Alternator 1 output is low, indicative of alternator failure and will
typically be associated with low M1 voltage, Battery 1 discharge and M
BUS 1 Caution message.
3A-12
ALT 1
• Caution •
Cirrus Design
SR20
P/N 21399-004
Revision A1