19
LOW VOLTAGE (Continued)
CAUSE
CHECK AND REMEDY
High resistance connections– Make better connection electrically and
Connections will be warm or hot mechanically.
Shorted field. Test field coils for possible short by checking resist-
ance with an ohmmeter or resistance bridge. Re-
turn rotor assembly to factory for repair if alternator
field coils are shorted.
Low power factor Reduce inductive (motor) load. Some AC motors
Draw approximately the same current regardless of
load. Do not use motors of larger horsepower rating
than is necessary to carry the mechanical load.
FLUCTUATING VOLTAGE
(May be indicated by flickering lights.)
CAUSE
CHECK AND REMEDY
Irregular speed of engine. Check engine for malfunction or load for fluctuation.
Fluctuating speed. Stabilize load. The addition of a lamp load (resist-
ance load) may compensate partially for load
changes caused by intermittent motor operation.
Do not overload.
Loose terminal or load connections. Make better connection mechanically and electri-
cally.
Defective bearing causing uneven air gap. Replace worn bearing.
HIGH VOLTAGE
CAUSE
CHECK AND REMEDY
Excessive speed. Check engine for malfunction.
OVERHEATING
CAUSE
CHECK AND REMEDY
Generator overloaded. Reduce load. (Check with ammeter and compare
with nameplate rating.)
Clogged ventilating screens. Clean air passages.
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