Section 2.3 - Troubleshooting Flowcharts; Introduction; Problem 1 - Generator Produces Zero Voltage Or Residual Voltage - Generac Power Systems CorePower Repair Manual

AC GENERATORS
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.
Problem 1 – Generator Produces Zero Voltage or Residual Voltage
TEST 1 –
CHECK MAIN
ON
CIRCUIT BREAKER
RESET TO
"ON" OR
REPLACE IF
BAD
REPLACE
VOLTAGE
REGULATOR
PERFORM
INSULATION
RESISTANCE TEST
REPLACE
STATOR
ONLY
PART 2

INTRODUCTION

TEST 4 – PERFORM
FIXED EXCITATION /
ROTOR AMP DRAW
A
B
C
TEST 9 – TEST
STATOR
GOOD
BAD
TEST 10 –
TEST ROTOR
ASSEMBLY
BAD
GOOD
REPLACE
ROTOR AND
STATOR
G
D
TEST 6 –
RESISTANCE
CHECK OF
ROTOR CIRCUIT
BAD
TEST 7 – CHECK
BRUSHES &
SLIP RINGS
GOOD
TEST 10 –
TEST ROTOR
ASSEMBLY
GOOD
PERFORM
INSULATION
RESISTANCE TEST
Section 2.2
Troubleshooting Flow Charts
RE-TEST
REPAIR
OR REPLACE
FUSES
CHECK
VOM
FUSES
GOOD
REPLACE
ROTOR ONLY
GOOD
TEST 9 – TEST
BAD
STATOR
BAD
REPLACE
ROTOR AND
STATOR
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