Piper CHEROKEE ARCHER II Pilot Operating Handbook page 154

PIPER AIRCRAFT CORPORATION
PA-28-181, CHEROKEE ARCHER II
SECTION 7
DESCRIPTION AND OPERATION
Unlike previous generator systems, the ammeter does not indicate battery discharge; rather it displays
in amperes the load placed on the alternator. With all electrical equipment off (except master switch) the
ammeter will be indicating the amount of charging current demanded by the battery. As each item of
electrical equipment is turned on, the current will increase to a total appearing on the ammeter. This total
includes the battery. The average load for night flight, with radios on, is about 30 amperes. This 30 ampere
value, plus appoximately two amperes for a fully charged battery, will appear continuously under these
flight conditions. The amount of current shown on the ammeter will teB immediately if the alternator system
is operating normally, as the amount of current shown should equal the total amperage drawn by the
equipment which is operating.
If no output is indicated on the ammeter during flight, reduce the electrical load by turning off all
unnecessary electrical equipment. Check both 5 ampere field breaker and 60 ampere output breaker and
reset
if
open.
If
neither circuit breaker is open. turn off the "ALT" switch for] second to reset the
overvoltage relay. If ammeter continues to indicate no output, maintain minimum electrical load and
terminate flight as soon as practical.
Maintenance on the alternator should prove to be a minor factor. Should service be required, contact
the local Piper Dealer.
ISSUED: AUGUST 15, 1975
REVISED: MARCH 16,1979
REPORT: VB-760
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