Trouble
Shooting
Chart
GENERAL
compare the clock's second hand movement with
that of the wrist watch. They should run at the same
The
following
lists
various
s~mptoms
of
poor speed.
If
clock
runs
faster, speed
is
too
generator operation with possible causes for them
and the appropriate corrective action. You will need
and
vice
versa).
a volt-ohm meter or test light to check some of the
CAUTION: Most electrical equipment in North
causes. For some of the ocher causes you will need
America operates at frequencies-between
59
and
to check generator speed. To check speed use
a
.
61
Hz
(CPS)..Operating the generator at frequen-
frequency meter, a tachometer, or a
120V-60Hz
elec-
cies outside that range may cause damage to the
tric clock and a correctly operating wrist watch.
generator and/or to electrical equipment driven
by
(Run the electric clock on generator power and
the generator.
SYMPTOM
No output voltage.
.
Low voltage.
High voltage.
Output voltage flickering or fluctuation.
Excessive vibration.
Generator overheating.
Oil leak.
CAUSE(S)
1.
Circuit breaker.
2.
Defective voltmeter.
3.
Short circuit in the load.
4.
-0efective receptacles.
5.
Loose (or broken) wires or connections in the
control box.
6.
Defective rectifier.
7.
Dirty slip rings.
8.
Brushes binding in holders.
9.
Shorted or open armature.
10.-
Shorted or open field coils.
1. Engine speed too slow.
Generator overloaded.
2.
Inadequate engine horsepower.
3.
Incorrect field excitation.
.
4.
Brushes not seated properly, or dirty brushes
and slip rings. (Remove brushes: check for
uneven wear or dirt on brushes or slip rings.)
Engine speed too fast.
1.
Tumbling bar (coupling shaft) misalignment.
2.
Engine speed not constant.
3.
Loose connection in field circuit.
4.
Tumbling bar U-joints not synchronized.
1.
Power take-off misalignment excessive.
2.
Loose mounting nuts and bolts or hold-down
studs.
3.
Universal joints in coupling shaft worn or dry.
4.
Defective bearings.
1.
Poor ventilation.
2.
Generator overloaded.
3.
Shorted turns in field or armature.
1.
Loose plug in gear case.
2.
Defective seal, gasket. or plug in gear case.
7
CORRECTIVE ACTION
1.
Reset circu~t breakers: replace if defective.
2.
Check output with another meter. replace meter
if defective.
3.
Disconnect the load. Check voltage at receptacle.
Check motors, sppliances and load leads lor
short
circu~t. Repa~r short.
4.
Remove panel cover and check for voltage to the
receptacles. Replace defective receptacles.
5.
Remove panel cover and check all wiring and
connections. Tighten
andior repair where neces-
sary.
6. Test rectifier. Replace if defective.
7.
Clean and polish. Use 00 sandpaper and crocus
cloth, never emery paper.
8.
Check brushes for swelling: replace defective
brushes; clean brush holders.
9.
Replace armature if open or shorted.
10. Measure between leads for open or short. Replace coil(s) if defective.
1.
Check engine speed. Increase RPM if necessary.
Reduce load if it is higher than the rated capacity
of the operator (See generator nameplate.)
2.
Generator requires
2.2
H.P.llOOO watts output.
Obtain larger engine if necessary.
3.
Check input AC voltage to rectifier. Check rectifier output OC voltage.
4.
Clean slip rings and seat brushes with sandpaper. (See Maintenance).
Check engine speed for correct input RPM.
1. Reduce tumbling bar misalignment to less than
15 degrees.
2.
Engine governor may be worn or improperly adjusted. Set or repair defective governor.
3.
Check and tighten connections.
4.
Reassemble tumbling bar.
1.
Correct misalignment. It should be less than
15
degrees.
2.
Tighten mounting nuts and bolts: repair holddown stud mountings.
3.
Repair or replace defective parts.
4.
Check for possible causes. Replace defective
bearings.
1.
Clean ventilation and cooling fan screens.
2.
Reduce load. then check voltage and current.
3.
Replace defective components.
1.
Tighten plug.
2.
Replace seal(s), gaskets or plugs. Maintain
correct oil level.