Problem 4 - Voltage And Frequency Drop Excessively When Loads Are Applied; Excessively When Loads Are Applied - Guardian 5240 Diagnostic Repair Manual

SECTION 2.3
TROUBLESHOOTING FLOWCHARTS

Problem 4 - Voltage and Frequency Drop Excessively When Loads Are Applied

TEST 14 - CHECK
BOTH
VOLTAGE AND
LOW
FREQUENCY
UNDER LOAD
GOOD
DISCONTINUE
TESTING
TEST 80 - CHECK
LC1 & LC2 WIRING
BAD
REPAIR OR REPLACE
DEFECTIVE WIRING
LOOK FOR A SHORTED
CONDITION IN A
CONNECTED LOAD OR
IN ONE OF THE LOAD
CIRCUITS
REPAIR OR REPLACE
Page 38
TEST 15 - CHECK
FOR OVERLAOD
CONDITION
OVERLOADED
REDUCE LOADS TO UNIT'S
RATED CAPACITY
TEST 81 - CHECK
IDLE CONTROL
GOOD
TRANSFORMER
PRIMARY WIRING
BAD
REPAIR OR REPLACE
DEFECTIVE WIRING
GOOD
TEST 7 - CHECK
STATOR AC
GOOD
POWER WINDINGS
BAD
PART 2
NOT
OVERLOADED
GOOD
REPAIR OR REPLACE
TEST 12A - CHECK
STEPPER MOTOR
GOOD
CONTROL
BAD
REPAIR OR REPLACE
ENGINE
CONDITION
GOOD
AC GENERATORS
IF RECONFIGURED TO LP GAS,
VERIFY THAT PROPER
PROCEDURE WAS FOLLOWED
(REFER TO SECTION 1.3)
UNITS WITH
UNITS WITH
V-TWIN
ENGINES
TEST 79 - CHECK
IDLE CONTROL
TRANSFORMER
BAD
THE IDLE CONTROL
TRANSFORMER
TEST 12 - CHECK AND
ADJUST ENGINE
GOVERNOR
GOOD
GO TO "PROBLEM 11 - ENGINE
STARTS HARD AND RUNS
ROUGH/LACKS POWER"
SECTION 4.3
SINGLE
CYLINDER
ENGINES