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Guardian 5240 - Troubleshooting Flow Charts; When Utility Power Source Fails; When AUTO-OFF-MANUAL Switch Is Set to MANUAL

Guardian 5240
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VERIFY UTILITY
SOURCE IS “OFF”
SYSTEM READY
LIGHT SHOULD BE
FLASHING
TEST 41 - CHECK
POSITION OF
AUTO-OFF-MANUAL
SWITCH
TEST 43 - TEST
AUTO-OFF-MANUAL
SWITCH
TEST 44 - CHECK
WIRE
15/15A/15B/239/0
VOLTAGE
TEST 42 - TRY A
MANUAL START
ON
GOOD
OFF
SWITCH IS “OFF”
SWITCH IS
IN “AUTO”
ENGINE DOES
NOT CRANK
ENGINE
CRANKS
BAD
SET TO “AUTO” -
RETEST
TURN “OFF” -
RETEST
GO TO PROBLEM 9
REPLACE
REPLACE PRINTED
CIRCUIT BOARD
Problem 8 - Engine Will Not Crank When Utility Power Source Fails
RECHARGE /
REPLACE
NOTE: If a starting problem is encountered,
the engine itself should be thoroughly
checked to eliminate it as the cause of starting
difficulty. It is a good practice to check the
engine for freedom of rotation by removing the
spark plugs and turning the crankshaft over
slowly by hand, to be sure it rotates freely.
WARNING: DO NOT ROTATE
ENGINE WITH ELECTRIC STARTER
WITH SPARK PLUGS REMOVED.
ARCING AT THE PLUG ENDS MAY
IGNITE THE LP OR NG VAPOR
EXITING THE SPARK PLUG HOLE.
TEST 46 - CHECK
BATTERY - LOW
BATTERY LED SHOULD
BE OFF
TEST 45 - CHECK15
AMP FUSE
TEST 43 - TEST
AUTO-OFF-MANUAL
SWITCH
TEST 44 - CHECK
WIRE
15/15A/15B/239/0
VOLTAGE
TEST 50 - TEST
STARTER MOTOR
TEST 47 - CHECK
WIRE 56 VOLTAGE
TEST 48 - CHECK
STARTER
CONTACTOR RELAY
(V-TWIN ONLY)
TEST 49 - CHECK
STARTER
CONTACTOR
BAD
BAD
BAD
BAD
BAD
BAD
BAD
BAD
GOOD
GOOD
GOOD
GOOD
GOOD
GOOD
GOOD
GOOD
REPLACE
REPLACE
REPLACE PRINTED
CIRCUIT BOARD
REPAIR /
REPLACE
REPLACE
Problem 9 - Engine Will Not Crank When AUTO-OFF-MANUAL Switch is Set to MANUAL
Page 96
PART 4
DC CONTROL
SECTION 4.3
TROUBLESHOOTING FLOW CHARTS

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