TP-6198 3/15
30 Section 3 Troubleshooting
Troubleshooting Chart
Problem
Reference
Corrective Action
Possible Cause
No output
voltage
AC output circuit breaker
open
Check for AC voltage on the generator side of circuit breaker. If
there is AC voltage on the generator side of the breaker, then a
problem in the load circuits is causing the line circuit breaker to
trip. Check for and correct short circuits or overloading on the
load side before resetting the circuit breaker.
—
Alternator or control
system
Perform separate excitation procedure to isolate the problem to
the alternator or the control system. Then troubleshoot the
alternator or control system components as follows.
Section 5.2
Aux. winding fuse blown
(lead 55)
Replace blown fuse. If fuse blows again, check stator.
Section 5.3
SCR module
Check auxiliary winding fuse F1 (lead 55).
Replace SCR module and test voltage.
Section 5.12
Section 4.7
Controller
Check controller settings. Check wiring and connections.
Before replacing controller, replace SCR module and check
voltage.
Section 4.9.2
Section 4.8
Open wiring, terminal, or
pin in buildup circuit or
SCR module circuit
Check continuity.
Section 5.13
W/D
Brushes
Inspect brushes and replace if worn
Section 5.6
Check for brushes sticking in brush holder or broken brush
spring
Section 5.6
Rotor connections
Check for open circuit in rotor connection circuit (leads FN and
FP to SCR and RIB)
W/D
Rotor slip rings dirty or
corroded
Check slip ring condition.
Section 5.4
Rotor (open, grounded, or
shorted windings)
Check voltage and continuity.
Section 5.4
Stator (open, grounded,
or shorted windings)
Check voltage and continuity.
Section 5.3
Flash relay (K3) on relay
interface board (RIB)
Check flash LED on RIB.
Check fuse F2 and troubleshoot RIB.
Section 4.6
Noisy
operation
Exhaust system leaks
Check and replace as necessary.
O/M
Engine not running
smoothly
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).
Engine S/M
Engine S/M: Engine Service Manual
I/M: Generator Set Installation Manual
O/M: Generator Set Operation Manual
W/D: Wiring Diagram Manual
Summary of Contents for 15/30RES
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Page 18: ...TP 6198 3 15 18 Section 1 Specifications Notes ...
Page 62: ...TP 6198 3 15 62 Section 5 Component Testing and Adjustment Notes ...
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