Troubleshooting Flowcharts; If Problem Involves Ac Output; Problem 4; High Or Low - Generac Power Systems Guardian 5410 Repair Manual

The "Flow Charts" in this section may be used in
conjunction with the "Diagnostic Tests" of Section 7.
Numbered tests in the Flow Charts correspond to
identically numbered tests of Section 7.
VOLTAGE &
FREQUENCY BOTH

HIGH OR LOW

GO TO PROBLEM 1
TEST 2 – CHECK
STEPPER MOTOR
CONTROL
INTROdUCTION

If Problem Involves AC Output

NO-LOAD VOLTAGE
FREQUENCY GOOD –
VOLTAGE HIGH
OR
VOLTAGE LOW
GO TO VOLTAGE
REGULATOR ADUST-
MENT, PAGE xx
Problem 1 – Voltage & Frequency Are Both High or Low
FREQUENCY GOOD.
LOW OR RESIDUAL
AC VOLTAGE
NO-LOAD FREQUENCY &
VOLTAGE GOOD BUT THEY
DROOP TO MUCH WHEN
LOAD IS APPLIED
FREQUENCY IS GOOD BUT
NO-LOAD VOLTAGE IS
HIGH OR VOLTAGE IS LOW

TROUBLESHOOTING FLOWCHARTS

Problems 1 through 4 apply to the AC generator only.
Beginning with Problem 5, the engine DC control sys-
tem is dealt with.
TEST 1 – CHECK
& FREQUENCY
FREQUENCY GOOD –
ZERO OR RESIDUAL
VOLTAGE
GO TO PROBLEM 2
Section 6
NO-LOAD VOLTAGE
& FREQUENCY
GOOD
GO TO PROBLEM 4
GO TO
PROBLEM 2
GO TO

PROBLEM 4

GO TO VOLTAGE
REGULATOR
ADJUSTMENT,
PAGE 9
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