Generac Power Systems 5415 Section TROUBLESHOOTING FLOWCHARTS, If Problem Involves AC Output

Section 6

TROUBLESHOOTING FLOWCHARTS

Introduction

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.

Problems 1 through 4 apply to the AC generator only.

Beginning with Problem 5, the engine DC control sys- tem is dealt with.

If Problem Involves AC Output

TEST 1 – CHECK

NO-LOAD VOLTAGE

& FREQUENCY

VOLTAGE &	FREQUENCY GOOD –	FREQUENCY GOOD –	NO-LOAD VOLTAGE
FREQUENCY BOTH	VOLTAGE HIGH	ZERO OR RESIDUAL	& FREQUENCY
HIGH OR LOW	OR	VOLTAGE	GOOD
	VOLTAGE LOW
GO TO PROBLEM 1	GO TO VOLTAGE	GO TO PROBLEM 2	GO TO PROBLEM 4
	REGULATOR ADUST-
	MENT, PAGE xx

TEST 2 – CHECK STEPPER MOTOR CONTROL

Problem 1 – Voltage & Frequency Are Both High or Low

FREQUENCY GOOD.	GO TO
LOW OR RESIDUAL
	PROBLEM 2
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

GO TO

PROBLEM 4

GO TO VOLTAGE

REGULATOR

ADJUSTMENT,

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