TP-5867 11/0220 Section 3 Troubleshooting
General Troubleshooting Chart, continued
Problem Possible Cause Corrective Action Reference
Emits black or
Fuel mixture adjustment incorrect Adjust fuel mixture. Section NO TAG, Fuel System
gray smoke
Air intake restriction Check air cleaner and intake. Engine O/M
Worn piston rings, valves, etc. Check compression. Engine S/M
Oil level high Check oil level. Section 2.2, Lubrication System
High oil
consumption
External leakage/defective
gaskets
Replace gaskets. Engine S/M
Worn piston rings, valves, etc. Check compression. Engine S/M
Engine knocks
Excessive load Reduce load Section 1.4, Generator Set
Specificaitons
Low oil level Check oil level and add oil if low Section 2.2, Lubrication System
Low output or
excessive
drop in
Engine speed too low Check engine speed using
tachometer or frequency meter.
Adjust governor as necessary.
Section 6.9, Electronic Governor
voltage
Generator overloaded Reduce load. Section 1.4, Generator Set
Specificaitons
Defective voltage regulator Test/readjust voltage regulator. Section 6.3, Voltage Regulator
Voltage regulator incorrectly
adjusted
Test/readjust voltage regulator. Section 6.3, Voltage Regulator
Defective rotor Test and/or replace. Section 6.4, Main Field (Rotor)
Defective stator Test and/or replace. Section 6.5, Stator
No battery
Defective battery charging Test/replace alternator. Engine S/M
charging
output
Loose or corroded battery
connections
Clean and tighten battery
connections.
Defective battery Check battery electrolyte level
and specific gravity (batteries with
filler caps only).
Section 2.7, Battery
High generator
output voltage
Engine speed too high Check engine speed using
tachometer or frequency meter.
Adjust governor as necessary.
Section 6.9, Electronic Governor
Defective voltage regulator Test/readjust voltage regulator. Section 6.3, Voltage Regulator
Voltage regulator incorrectly
adjusted
Test/readjust voltage regulator. Section 6.3, Voltage Regulator
Loose voltage regulator
connections (including 33 and 44
sensing leads).
Check voltage regulator
connections.
Section 6.3, Voltage Regulator
No generator
output voltage
AC output circuit breaker open or
defective
Check position of circuit breaker.
Check AC voltage on generator
side of circuit breaker.
Section 9, Wiring Diagrams, and
O/M
AC circuit breaker tripping
because of overload on generator
set
Reduce load, reset and attempt
startup.
—
Transfer switch or other power
source in OFF position.
Turn handle to correct position. Transfer Switch Operation Manual
No battery voltage to terminal (+)
and (--) of voltage regulator during
cranking
Check for 12VDC at voltage
regulator (+) and (--).
Section 9, Wiring Diagrams
Fuse blown in voltage regulator
circuit (lead 55)
Replace blown fuse. If fuse blows
again, check voltage regulator
and stator auxiliary windings.
Section 6, Component Testing
and Adjustment and 9, Wiring
Diagrams
Short circuit in wiring causing
circuit breaker to trip open
Reset circuit breaker. If breaker
trips again, check wiring.
Section 9, Wiring Diagrams
Defective rotor (open, grounded,
or shorted windings)
Test and/or replace. Section 6, Component Testing
and Adjustment
To Next Page
Loading...
