Section 2.3 - Troubleshooting Flowcharts; Introduction; For Under-Voltage; Problem 1 - Generator Shuts Down - Generac Power Systems 7 kW NG Repair Manual

Section 2.3
Troubleshooting Flow Charts
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 Shuts Down for Under Voltage
REPLACE
CONTROLLER
TEST 5 – TEST
SENSING CIRCUIT
WIRES 11 AND 44
BAD
GOOD
REPAIR
OR
REPLACE
GOOD
BAD
PERFORM STATOR
INSULATION
RESISTANCE TEST
SECTION 1.5
REPLACE
GOOD
STATOR
ONLY
Page 44

INTRODUCTION

TEST 4 – PERFORM
A
FIXED EXCITATION /
ROTOR AMP DRAW
D
B
C
TEST 6 – TEST
EXCITATION
WINDING CIRCUIT
2 AND 6
GOOD
TEST 7 – TEST
STATOR
BAD
TEST 10 –
TEST ROTOR
ASSEMBLY
BAD
REPLACE
ROTOR AND
STATOR
PART 2
G
TEST 8 –
RESISTANCE
CHECK OF
ROTOR CIRCUIT
FIELD BOOST
CIRCUIT FAILURE
BAD
REPLACE HARNESS
REPAIR
OR
REPLACE
GOOD
REPLACE
ROTOR ONLY
AC GENERATORS
RE-TEST
REPAIR
OR REPLACE
FUSES
CHECK
VOM
FUSES
GOOD
ROTOR CIRCUIT
FAILURE
TEST 9 –
CHECK
BAD
BRUSHES &
SLIP RINGS
GOOD
TEST 10 –
TEST ROTOR
BAD
ASSEMBLY
TEST 7 – TEST
GOOD
STATOR
BAD
PERFORM ROTOR
INSULATION
REPLACE
RESISTANCE TEST
ROTOR AND
SECTION 1.5
STATOR