Low generator output.
a. Generators not paralleled.
b. Defective generator control unit.
a. Malfunctioning generator control unit.
Volt-loadmeter reads off scale in wrong direction.
a. Generator field magnetized in wrong direction.
Volt-loadmeter does not indicate.
a. Tripped circuit breaker.
b. Open volt-loadmeter lead
c. Defective volt-loadmeter.
No power indicated with BATT master switch
a. Battery discharged or defective.
b. Open circuit between battery and BATT master
c. Master switch defective.
d. Defective relay.
e. Keylock switch OFF.
Power on with BATT master switch in OFF posi-
a. Master switch defective.
b. Relay contacts stuck.
Apparent loss of battery capacity.
a. Cells unbalanced.
b. Electrolyte level too low.
c. Charging rate too low in aircraft.
d. Too little usage or shallow discharges.