Guardian 4389 Repair Manual page 36

SECTION 2.3
TROUBLESHOOTING FLOWCHARTS
Problem 4 - Voltage and Frequency Drop Excessively When Loads Are Applied
TEST 14 - CHECK
VOLTAGE AND
FREQUENCY
UNDER LOAD
GOOD
DISCONTINUE TESTING
REPAIR OR
BAD
REPLACE
Page 34
TEST 15 - CHECK
BOTH
FOR OVERLAOD
LOW
CONDITION
OVERLOADED
REDUCE LOADS TO
UNIT'S RATED CAPACITY
TEST 7 - CHECK
STATOR AC
POWER WINDINGS
GOOD
LOOK FOR A SHORTED
CONDITION IN A CONNECTED
LOAD OR IN ONE OF THE LOAD
CIRCUITS
PART 2
NOT OVERLOADED
ENGINE CONDITION GOOD
AC GENERATORS
IF RECONFIGURED TO LP GAS,
VERIFY THAT PROPER
PROCEDURE WAS FOLLOWED
AS STATED IN OWNER"S MANUAL
TEST 12 - CHECK AND
ADJUST ENGINE
GOVERNOR
GOOD
GO TO "PROBLEM 11 - ENGINE
STARTS HARD AND RUNS
ROUGH/LACKS POWER"
SECTION 4.3