AC GENERATORS
PART 2
Page 27
Section 2.2
Troubleshooting Flow Charts
INTRODUCTION
Use the “Flow Charts” in conjunction with the detailed instructions in Section 2.4. Test numbers used in the flow charts correspond
to the numbered tests in Section 2.4. The first step in using the flow charts is to identify the correct problem on the following pages.
For best results, perform all tests in the exact sequence shown in the flow charts.
REPLACE
ROTOR ONLY
RESET TO
“ON” OR
REPLACE IF
BAD
GOOD
GOOD
REPLACE
STATOR
ONLY
REPLACE
ROTOR AND
STATOR
PERFORM
INSULATION
RESISTANCE TEST
PERFORM
INSULATION
RESISTANCE TEST
TEST 9 – TEST
STATOR
CHECK
VOM
FUSES
REPAIR
OR REPLACE
FUSES
RE-TEST
BAD
BAD
BAD
GOOD
GOOD
GOOD
GOOD
ON
Problem 1 – Generator Produces Zero Voltage or Residual Voltage
TEST 4 – PERFORM
FIXED EXCITATION /
ROTOR AMP DRAW
D
G
A
C
B
REPLACE
VOLTAGE
REGULATOR
TEST 7 –
CHECK
BRUSHES &
SLIP RINGS
BAD
REPLACE
ROTOR AND
STATOR
BAD
TEST 10 –
TEST ROTOR
ASSEMBLY
TEST 10 –
TEST ROTOR
ASSEMBLY
TEST 1 –
CHECK MAIN
CIRCUIT BREAKER
TEST 6 –
RESISTANCE
CHECK OF
ROTOR CIRCUIT
TEST 9 – TEST
STATOR