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AC GENERATORS
SECTION 2.3
TROUBLESHOOTING FLOWCHARTS
PART 2
Page 39
STOP
TESTS
FREQUENCY O.K.,
BUT VOLTAGE LOW
TEST 14 - CHECK
AC OUTPUT
FREQUENCY
TEST 15 - ADJUST
ENGINE GOVERNOR
TEST 16 - CHECK
STEPPER MOTOR
CONTROL
TEST 2 - CHECK
AC OUTPUT
VOLTAGE
TEST 17 - ADJUST
VOLTAGE
REGULATOR
TEST 9 -
CHECK
CAPACITOR
LOW
LOW -
SINGLE CYLINDER
UNITS
LOW -
V-TWIN UNITS
FREQUENCY O.K.,
BUT VOLTAGE IS
STILL LOW
GO TO “PROBLEM 1” FLOW CHART -
START AT “TEST 4 - F/E”
GO TO “PROBLEM 2”
VOLTAGE AND FREQUENCY O.K.
8/10 kW UNITS
8/10 kW UNITS
NO VOLTAGE
GO TO TEST 4
GO TO “PROBLEM 2”
8/10 kW UNITS
12-20 kW UNITS
12-20 kW UNITS
12-20 kW UNITS
FREQUENCY AND
VOLTAGE O.K.
Problem 3 - Generator Produces Low Voltage at No-Load
STOP
TESTS
Problem 4 - Generator Produces High Voltage at No-Load
TEST 14 - CHECK
AC OUTPUT
FREQUENCY
TEST 15 - ADJUST
ENGINE GOVERNOR
TEST 16 - CHECK
STEPPER MOTOR
CONTROL
TEST 2 - CHECK
AC OUTPUT
VOLTAGE
HIGH
HIGH -
SINGLE CYLINDER
UNITS
HIGH -
V-TWIN UNITS
REPLACE DEFECTIVE
VOLTAGE REGULATOR
FREQUENCY AND
VOLTAGE O.K.
TEST 17 - ADJUST
VOLTAGE
REGULATOR
TEST 9 -
CHECK
CAPACITOR
8/10 kW UNITS
12-20 kW UNITS
FREQUENCY O.K.,
BUT VOLTAGE IS
STILL HIGH
FREQUENCY O.K.,
BUT VOLTAGE HIGH
VOLTAGE AND FREQUENCY O.K.
GO TO “PROBLEM 2”
8/10 kW UNITS
12-20 kW UNITS