Generac Power Systems CorePower User Manual

AC GENERATORS
PART 2
Page 29
Section 2.3
Troubleshooting Flow Charts
STOP TESTS
VOLTAGE AND
FREQUENCY O.K.
STOP TESTS
Problem 3 – Generator Produces High Voltage at No-Load
HIGH LOW
FREQUENCY O.K.,
BUT VOLTAGE HIGH
FREQUENCY O.K.,
BUT VOLTAGE IS
STILL HIGH
REPLACE DEFECTIVE
VOLTAGE REGULATOR
TEST 11 – CHECK
AC OUTPUT
VOLTAGE
TEST 14 – ADJUST
VOLTAGE
REGULATOR
TEST 12 – CHECK
AC OUTPUT
FREQUENCY
FREQUENCY AND
VOLTAGE O.K.
FREQUENCY O.K.,
BUT VOLTAGE
HIGH
TEST 13 – ADJUST
ENGINE
GOVERNOR
DISCONTINUE
TESTING
TEST 13 – CHECK
AND ADJUST ENGINE
GOVERNOR
TEST 16 – CHECK
VOLTAGE AND
FREQUENCY
UNDER LOAD
TEST 15 – CHECK
FOR OVERLAOD
CONDITION
GO TO “PROBLEM 23 –
ENGINE STARTS HARD AND
RUNS ROUGH/LACKS POWER”
BOTH
LOW
NOT OVERLOADED
GOOD GOOD
BAD
GOOD
ENGINE CONDITION GOOD
REPAIR OR REPLACE
LOOK FOR A SHORTED
CONDITION IN A
CONNECTED LOAD OR IN
ONE OF THE LOAD CIRCUITS
REDUCE LOADS TO
UNIT’S RATED
CAPACITY
OVERLOADED
Problem 4 - Voltage and Frequency Drop Excessively When Loads Are Applied
TEST 9 – CHECK
STATOR AC
POWER WINDINGS

Generac Power Systems CorePower Specifications

General

Brand	Generac Power Systems
Model	CorePower
Category	Portable Generator
Language	English