Alternator Diagnostics - Honeywell HW4000 Service Manual

8.2 ALTERNATOR DIAGNOSTICS

No Power
at AC Receptacles
Check Tripped Circuit Breaker
Outlets Above the Breaker
Indicate the Excess Load
Source
Resolve Overload Problem
to Ensure Safe Operation
After Electrical Load Resolved
Wait 3 Minutes
Push to Reset Breaker
Check Alternator Brushes
for Residue or Defect
(see Manual Section
"Alternator - Carbon Brush")
Check Voltage Regulator
for Proper Operation
(see Manual Section
"Alternator - Voltage Regulator")
Honeywell Portable Generator Service Manual
Poor Alternator
Performance
Check Rotor Winding
(see Manual Section
"Alternator -
Rotor Winding Connector")
Check Main Winding
(see Manual Section
"Alternator -
Main Winding Terminal Block")
Check Exciter Winding
(see Manual Section
"Alternator -
Exciter Winding Connector")
RPM Slows Under
Electrical Load
Check Engine RPM at Spec
Idle Speed = 63 hz
Adjust Governor, if necessary
Confirm Governor Operation
Adjust Throttle Position to
Increase Engine Power
POWER CONTROL CENTER
HOUSEHOLD
OUTLETS
120 VOLTS AC
BREAKER
BREAKER
PORTABLE GENERATOR
5500 CONTINUOUS WATTS - 9375 MAXIMUM WATTS
Power Not at
All Receptacles
Check Breakers
Check Wiring Between
Alternator and Receptacles
Check Extensions or
Appliances for Proper Operation
AC Power Voltage
or Frequency High
Check Engine RPM at Spec
Idle Speed = 63 hz
Adjust Governor, if necessary
Check Voltage Regulator at Spec
Output Voltage = 108-112 V
Adjust Potentiometer, if necessary
4-IN-1 POWER CORD OF
TRANSFER SWITCH
120/240 VOLTS AC
MASTER
BREAKER
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ALTERNATOR DIAGNOSTICS
AC Power Voltage
or Frequency Low
Check Engine RPM at Spec
Idle Speed = 63 hz
Adjust Governor, if necessary
Evaluate Generator Load
If Fuel Ran Out During
Electrical Load,
Flash the Field to Recharge
Check Rotor Winding
(see Manual Section
"Alternator -
Rotor Winding Connector")
Check Main Winding
(see Manual Section
"Alternator -
Main Winding Terminal Block")
Check Exciter Winding
(see Manual Section
"Alternator -
Exciter Winding Connector")
8-3