225 South Cordova Avenue
Le Center, Minnesota 56057
507-357-6831
SYMPTOM CAUSE(S)
CORRECTIVE ACTION
No output
1.
Circuit breaker open.
1.
Reset circuit breakers, replace if defective.
voltage.
2.
Defective voltmeter.
2.
Check output with another meter, replace meter if defective.
3.
Short circuit in the load.
3.
Disconnect the load. Check voltage at receptacle cord set.
Check motors, appliances and load leads for short circuit.
Repair short.
4.
Defective receptacles.
4.
Remove panel cover and check for voltage to the
receptacles. Replace defective receptacles.
5.
Loose (or broken) wires or
5.
Remove panel cover and check all wiring and connections.
connections in control box.
Tighten and/or repair where necessary.
6.
Defective rectifier.
6.
Test rectifier. Replace if defective.
7.
Dirty slip rings.
7.
Clean and polish. Use 00 sandpaper or crocus cloth,
never use emery paper.
8.
Brushes binding in holders.
8.
Check brushes for swelling; replace defective brushes;
clean brush holders.
9.
Shorted or open armature.
9.
Measure armature resistance. Replace armature if open or
shorted.
10.
Shorted or open field coils.
10.
Measure between leads for open or short. Replace field coils if
defective.
Low voltage.
1.
Engine speed too slow.
1.
Check engine speed. Increase RPM if necessary.
2.
Generator overloaded.
2.
Reduce load if it is higher than the rated capacity of the
generator. (See generator nameplate).
3.
Inadequate engine horsepower.
3.
Generator requires 2.0 HP/1000 watts output. Obtain
larger engine if necessary.
4.
Incorrect field excitation.
4.
Check for worn brushes and weak or broken brush springs;
(No-load output low.)
replace as required. Check input AC voltage to rectifier.
Check rectifier output DC voltage to positive DC brush. If no
DC voltage is present at the brush, replace the rectifier.
Check for dirty slip rings. Clean them if they are dirty.
High voltage.
1.
Engine speed too fast.
1.
Check engine speed for correct input RPM.
Output voltage 1.
Tumbling bar (coupling shaft)
1.
Reduce tumbling bar misalignment to less than 15 degrees.
flickering or
misalignment.
fluctuation.
2.
Engine speed not constant.
2.
Engine governor may be worn or improperly adjusted. Set or
repair defective governor.
3.
Loose connection in field circuit.
3.
Check and tighten connections.
4.
Tumbling bar U-joints not
4.
Reassemble tumbling bar; see Figure 7.
synchronized.
Excessive
1.
Power take-off misalignment
1.
Correct misalignment. It should be less than 15 degrees.
vibration.
excessive.
2.
Loose mounting nuts and bolts
2.
Tighten mounting nuts and bolts; repair hold-down stud
or hold-down studs.
mountings.
3.
Universal joints in coupling
3.
Repair or replace defective parts.
shaft worn or dry.
4.
Defective bearings.
4.
Check for possible causes. Replace defective bearings.
Generator
1.
Poor ventilation.
1.
Clean ventilation and cooling fan screens.
overheating.
2.
Generator overloaded.
2.
Reduce load, then check voltage and current.
3.
Shorted turns in field or
3.
Replace defective components.
armature windings.
Oil leak.
1.
Loose plug in gear case.
1.
Tighten plug.
2.
Defective seal, gasket, or
2.
Replace seal(s), gaskets or plugs. Maintain correct oil level.
plug in gear case.
TROUBLE SHOOTING TABLE
