Problem 2 - Generator Produces Lowvoltage At No-Load; Problem 3 - Generator Produces High Voltage At No-Load; Prepackaged; Ac Generators - Guardian 4721 Repair Manual

SECTION 2.3
TROUBLESHOOTING FLOW CHARTS
Problem 2 - Generator Produces Low Voltage at No-Load
TEST 2 - CHECK
AC OUTPUT
VOLTAGE
TEST 13- ADJUST
VOLTAGE
REGULATOR
FREQUENCY O.K.,
BUT VOLTAGE IS
STILL LOW

Problem 3 - Generator Produces High Voltage at No-Load

TEST 2 - CHECK
AC OUTPUT
VOLTAGE
VOLTAGE AND
FREQUENCY O.K.
DISCONTINUE TESTING
Page 28
TEST 12 - CHECK
AC OUTPUT
LOW
FREQUENCY
FREQUENCY O.K.,
BUT VOLTAGE LOW
VOLTAGE AND FREQUENCY O.K.
GO TO "PROBLEM 1"
FLOW CHART - START
AT "TEST 5 - F/E"
TEST 12 - CHECK
HIGH AC OUTPUT
FREQUENCY
FREQUENCY O.K.,
BUT VOLTAGE HIGH
TEST 14 - ADJUST
VOLTAGE
REGULATOR
FREQUENCY O.K.,
BUT VOLTAGE IS
STILL HIGH
PART 2
TEST 13 - CHECK AND
ADJUST GOVERNOR
LOW
BOARD AND
STEPPER MOTOR
TEST 13 - CHECK AND
ADJUST GOVERNOR
HIGH
BOARD AND
STEPPER MOTOR
FREQUENCY AND
VOLTAGE O.K.
DISCONTINUE TESTING
REPLACE DEFECTIVE
VOLTAGE REGULATOR
PREPACKAGED LIQUID
COOLED AC GENERATORS
FREQUENCY AND
VOLTAGE O.K.
STOP TESTS
FREQUENCY O.K.,
BUT VOLTAGE HIGH