For High Voltage - Generac Power Systems 7 kW NG Repair Manual

AC GENERATORS
Problem 1 – Generator Shuts Down for Under Voltage (Continued)
TEST 10 –
TEST ROTOR
ASSEMBLY
GOOD
PERFORM ROTOR
INSULATION
RESISTANCE TEST
SECTION 1.5
GOOD
RE-TEST
TEST 4
TEST 2 - CHECK
HIGH
AC OUTPUT
VOLTAGE
REFER TO
PROBLEM 1
TEST 3 -
CALIBRATE
VOLTAGE
PART 2
TEST 4 – PERFORM
E
FIXED EXCITATION /
ROTOR AMP DRAW
H
BAD
TEST 7 –
TEST STATOR
GOOD
BAD
REPLACE REPLACE
ROTOR ROTOR
ONLY AND
STATOR
Problem 2 – Generator Produces High Voltage
TEST 11 - CHECK
AC OUTPUT
FREQUENCY
VOLTAGE OUTPUT AT
BREAKER IS BELOW
220 OR ABOVE 270
VOLTS AC
VOLTAGE OUTPUT
AT BREAKER IS
BETWEEN
220-270 VAC
F
TEST 7 –
TEST STATOR
GOOD
PERFORM STATOR
INSULATION
RESISTANCE TEST
SECTION 1.5
REPLACE
TEST 12 - CHECK
HIGH STEPPER MOTOR
CONTROL
FREQUENCY O.K.,
BUT VOLTAGE
INCORRECT
Section 2.3
Troubleshooting Flow Charts
BAD
TEST 10 –
TEST ROTOR
ASSEMBLY
GOOD
BAD
REPLACE
STATOR
ROTOR
ONLY
AND
STATOR
FREQUENCY AND
VOLTAGE O.K.
STOP
TESTS
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