Troubleshooting Flowcharts; If Problem Involves Ac Output; Problem 1 - Generator Produces Zero Voltage Or Residual Voltage - Generac Power Systems XT-EFI Series Manual

Troubleshooting Flowcharts

Introduction
Use the Flow Charts in conjunction with the
the numbered tests in the
on the following pages. For best results, perform all tests in the exact sequence shown in the flow charts.

If Problem Involves AC Output

VOLTAGE &
FREQUENCY BOTH
HIGH OR LOW
GO TO PROBLEM 2
Problem 1 – Generator Produces Zero Voltage or Residual Voltage
TEST 2 – CHECK
MAIN CIRCUIT
BREAKER
RESET TO "ON"
OR REPLACE IF BAD
REPLACE
ROTOR
Diagnostic Repair Manual
AC Diagnostic Tests
AC Diagnostic Tests . The first step in using the flow charts is to identify the correct problem
NO LOAD VOLTAGE
FREQUENCY GOOD FREQUENCY GOOD,
VOLTAGE HIGH LOW OR RESIDUAL
GO TO PROBLEM 4 GO TO PROBLEM 1
TEST 3 – CHECK
CONTINUITY OF
ON
RECEPTACLE PANEL
BAD
REPLACE COMPONENT
AS NEEDED
TEST 8 – TEST
BRUSHLESS
GOOD
STATOR
WINDINGS
BAD
. Test numbers used in the flow charts correspond to
p
TEST 1 - CHECK
& FREQUENCY
ZERO VOLTAGE
ZERO FREQUENCY
VOLTAGE
VERIFY ROTOR IS SPINNING,
GO TO PROBLEM 1
g
GOOD
TEST 7 – TEST
GOOD BRUSHLESS
DPE WINDING
BAD
REPLACE
STATOR
Section 1 Brushless Capacitor Excitation
NO LOAD VOLTAGE &
FREQUENCY GOOD -
VOLTAGE/FREQUENCY
FALLS OFF UNDER LOAD
GO TO PROBLEM 3
g
TEST 5 – FIELD
FLASH
ALTERNATOR
RE-CHECK VOLTAGE
AT RECEPTACLE
PANEL
GOOD
BAD
STOP
TESTING
TEST 6 –
CHECK
GOOD
CAPACITOR
BAD
REPLACE
3