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Troubleshooting Chart, continued
Problem
Possible Cause
No output
Open wiring, terminal, or pin in
voltage
buildup circuit or SCR module
(continued)
(
)
circuit
Rotor connections
Rotor (open, grounded, or shorted
windings)
Stator (open, grounded, or
shorted windings)
Flash relay (K3) on relay interface
board (RIB)
Generator set
Exhaust system leaks
i
is noisy
i
Engine not running smoothly
Broken or damaged vibromount(s) Check and replace as necessary.
Loose or vibrating sheet
metal/housing
Exhaust piping or air inlets/outlets
not securely installed
Excessive engine/generator
vibration
Emits black or
Air intake restriction
gray smoke
Emits black or
Oil level high
gray smoke
k
Worn piston rings, valves, etc.
High oil
External leakage/defective
consumption
p
gaskets
Worn piston rings, valves, etc.
Engine knocks Excessive load
g
Low oil level
34
Section 6 Troubleshooting
Corrective Action
Check continuity.
Check for open circuit in the rotor
connection circuit (leads FN and
FP to the SCR and RIB).
Check voltage and continuity.
Check voltage and continuity.
Check flash LED on RIB.
Check fuse F2 and troubleshoot
RIB.
Check and replace as necessary.
See "Generator set operates
erratically," this table.
Retighten screws, replace rivets.
Inspect for loose parts and secure
if necessary.
Check, rotor, crankshaft, bearing,
etc. (disassembly of engine and/or
alternator may be required).
Check air cleaner and intake.
Check oil level.
Check compression.
Replace gaskets.
Check compression.
Reduce load
Check oil level and add oil if low
Reference
Section 7.7
Section 8.6
Section 8.6
Section 8.7
Section 7.10
—
See "Generator set operates
erratically," this table
—
—
—
Section 9, Disassembly/
Reassembly and Engine S/M
Section 3
Section 2 and Generator Set O/M
Engine S/M
Engine S/M
Engine S/M
Generator Set I/M
Section 2 and Generator Set O/M
TP-6359 7/08
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