Kohler 6.5-27EFOZD, Service, Page: 44 / 104

TP-6255 7/06 44 Section 6 Troubleshooting
Troubleshooting Chart, continued
Problem Reference Corrective Action Possible Cause
No output
voltage
(continued) Open wiring, terminal, or pin in
buildup circuit or SCR module
circuit Check continuity. Section 7.7
( )
Rotor connections Check for open circuit in the rotor
connection circuit (leads FN and
FP to the SCR and RIB). Section 8.6
Rotor (open, grounded, or shorted
windings) Check voltage and continuity. Section 8.6
Stator (open, grounded, or
shorted windings) Check voltage and continuity. Section 8.7
Flash relay (K3) on relay interface
board (RIB) Check flash LED on RIB.
Check fuse F2 and troubleshoot
RIB.
Section 7.10
Generator set
i
i
Exhaust system leaks Check and replace as necessary. —
is noisy
Engine not running smoothly See “Generator set operates
erratically,” this table. See “Generator set operates
erratically,” this table
Broken or damaged vibromount(s) Check and replace as necessary. —
Loose or vibrating sheet
metal/housing Retighten screws, replace rivets.
—
Exhaust piping or air inlets/outlets
not securely installed Inspect for loose parts and secure
if necessary. —
Excessive engine/generator
vibration Check, rotor, crankshaft, bearing,
etc. (disassembly of engine and/or
alternator may be required). Section 9, Disassembly/
Reassembly and Engine S/M
Emits black or
gray smoke Air intake restriction Check air cleaner and intake. Section 3
Emits black or
k
Oil level high Check oil level. Section 2 and Generator Set O/M
gray smoke
Worn piston rings, valves, etc. Check compression. Engine S/M
High oil
consumption External leakage/defective
gaskets Replace gaskets. Engine S/M
p
Worn piston rings, valves, etc. Check compression. Engine S/M
Engine knocks Excessive load Reduce load Generator Set I/M g
Low oil level Check oil level and add oil if low Section 2 and Generator Set O/M