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The “Flow Charts” in this section may be used in
conjunction with the “Diagnostic Tests” of Section 6.
Numbered tests in the Flow Charts correspond to
identically numbered tests of Section 6.
Problems 1 through 5 apply to the AC generator only.
Beginning with Problem 5, the engine DC control sys-
tem is dealt with.
Section 5
TROUBLESHOOTING FLOWCHARTS
Page 28
GO TO PROBLEM 1
(BELOW)
GO TO PROBLEM 2 GO TO PROBLEM 2 GO TO PROBLEM 3GO TO VOLTAGE
REGULATOR
ADJUSTMENT,
PAGE 11
TEST 1 - CHECK NO
LOAD VOLTAGE &
FREQUENCY
If Problem Involves AC Output
VOLTAGE &
FREQUENCY BOTH
HIGH OR LOW
FREQUENCY GOOD -
ZERO OR RESIDUAL
VOLTAGE
ZERO VOLTAGE AND
ZERO FREQUENCY
FREQUENCY GOOD -
VOLTAGE HIGH
OR
VOLTAGE LOW
NO-LOAD VOLTAGE &
FREQUENCY GOOD -
VOLTAGE/FREQUENCY
FALLS OFF UNDER LOAD
INTRODUCTION
Problem 1 - Voltage & Frequency Are Both High or Low
TEST 5 - CHECK
STEPPER MOTOR
CONTROL
GO TO VOLTAGE
REGULATOR
ADJUSTMENT,
PAGE 11
FREQUENCY IS GOOD,
BUT NO-LOAD
VOLTAGE IS HIGH
OR VOLTAGE
IS LOW