Recreational Vehicle Generator Diagnostic Repair Manual

Section 6
TROUBLESHOOTING FLOWCHARTS
Page 27
REPAIR
OR
REPLACE
REPAIR
OR
REPLACE
TEST 4 – PERFORM
FIXED EXCITATION TEST
/ ROTOR AMP DRAW
Problem 2 – Generator Produces Zero Voltage or ResidualVoltage (5-12VAC)
(continued)
INSULATION
RESISTANCE
TEST, PAGE 13
TEST ROTOR
INSULATION,
PAGE 14
BAD
BAD
BAD
GOOD
GOOD
E
F
G
TEST 6 – TEST
STATOR DPE
WINDING
TEST 10 –
CHECK ROTOR
ASSEMBLY
TEST 7 – CHECK
SENSING LEADS /
POWER WINDINGS
CHECK VOM FUSES –
VERIFY AMP METER
FUNCTIONS
REPLACE FUSES
– THEN RE-TEST
EITHER OR
BOTH BAD
(PERFORM BOTH TEST 7 & 8)
REPLACE
PRINTED CIRCUIT
BOARD
GO TO PROBLEM 8
TEST 2 – CHECK
STEPPER MOTOR
CONTROL
TEST 12 – CHECK
LOAD VOLTAGE &
FREQUENCY
TEST 13 – CHECK
LOAD WATTS &
AMPERAGE
BAD
GOOD
END TEST
GOOD
Problem 3 – Excessive Voltage/Frequency Droop When Load is Applied
(Underspeed Warning – 4 Flashes on SW1 LED)
NOT OVERLOADED
OVERLOADED
REDUCE LOAD