Problems And Solutions - Baldor PG 6000 Installation & Operating Manual

Problems and Solutions

Some of the more common problems are listed in Table 5‐1. This information is intended to be a
check or verification that simple causes can be located and fixed. It is not an exhaustive "how to"
for all types of problems. Procedures that require in depth knowledge or skills (like flashing the
field) should be referred to generator service facility.
Problem
Engine will not start
Engine starts but will not run smoothly
Engine overheats
No output voltage
Output voltage varies
Low output voltage
High output voltage
Electrical shock when frame is touched
Mechanical noise
Service Service for your generator can be obtained from a generator service center. Please have the
following information available:
Parts Parts for your generator can be obtained from a generator service center. Please have the
following information available:
Note: Engine parts can usually be obtained by using the information in the engine
5‐2 Troubleshooting and Maintenance
Table 5‐1 Troubleshooting Guide
Possible Cause
No fuel.
Restricted air flow.
No spark.
Fuel or ignition problem
Excessive load
Debris or dirt buildup on engine
Ciruit Breaker tripped or defective.
Loss of residual magnetism in exciter
field poles.
Open in stator windings
Defective exciter circuit.
Irregular speed (fixed speed mode)
Fluctuating speed (fixed speed mode)
Loose terminal or load connections
Defective bearing (uneven air gap)
Low engine speed
Excessive load
High resistance connections -
connections will be warm or hot
Shorted field
Low power factor
Excessive speed (fixed speed mode)
Static charge.
Grounded armature or field coil.
Defective bearing
Rotor rubbing on stator
Loose or misaligned coupling
The model number and serial number of the generator set.
A complete and accurate description of the problem.
The model number and serial number of the generator set.
A complete and accurate description of the part (part number if known).
manufacturer's owner's manual.
Remedy
Check that fuel valves are ON. Check fuel level in fuel tank.
Check/replace air filter.
Check/replace spark plug(s). Check that engine switch is in Start
position.
Refer to engine manual.
Remove one or more electrical loads.
Remove debris. Clean engine surfaces to allow cooling.
Reset circuit breaker or replace if required.
Flash field.
Check for continuity in windings. Return to factory for repair if open.
Check/replace diode and capacitor and flash the field.
Check engine for malfunction or load for fluctuation
Stabilize load. The addition of a lamp load (resistance load) may
compensate partially for load changes caused by intermittent motor
operation. Do not overload.
Verify all connections are proper and check tighness torque of
terminals.
Replace worn bearing
Check that the Auto Idle switch is in OFF position (if installed).
Check engine for malfunction or system for overload. Reduce load.
Verify all connections are proper and check tighness torque of
terminals.
Test field coils for possible short by checking resistance with an
ohmmeter or resistancebridge. Return rotor assembly to service
center for repair if alternator field coils are shorted.
Reduce inductive (motor) load. Some AC motors use about the
same current regardless of load. Do not use motors of greater
horsepower rating than is necessary to move the mechanical load.
Check engine for malfunction
Ground generator frame at local reference ground (see Section 3).
Return to service center for repair
Replace bearing
Bad bearing - replace.
Bent shaft - return to service center.
Loose end bell - tighten;
Loose drive Discs - tighten
Tighten; align coupling and alternator shaft to engine shaft.
MN2418