Guardian 4389 Repair Manual page 96

SECTION 4.3
TROUBLESHOOTING FLOW CHARTS
TEST 64 - CHECK BATTERY CHARGE OUTPUT
UTILITY ON
GENERATOR OFF
GENERATOR
RUNNING
BATTERY
CHARGE
WORKING
TEST 65 - TEST
TRANSFORMER (TX)
GOOD
VOLTAGE OUTPUT
TEST 7 - TEST
GOOD
STATOR
GOOD
TEST 67 - TEST
BATTERY CHARGE
RELAY
BAD
REPLACE
Page 94
Problem 13 - No Battery Charge
GOOD GOOD
BAD
GOOD GOOD
BAD
TEST 66 - CHECK AC
VOLTAGE AT
BATTERY CHARGER
BAD
TEST 68 - TEST
BATTERY CHARGE
WINDING HARNESS
INSULATION
RESISTANCE TEST,
PAGE 1.4-1
TEST 66 - CHECK AC
VOLTAGE AT
BAD
BATTERY CHARGER
BAD
BAD
TEST 67 - TEST
BATTERY CHARGE
BAD
RELAY
TEST 67 - TEST
BATTERY CHARGE
GOOD
RELAY
BAD
REPLACE
TEST 65 - TEST
TRANSFORMER (TX)
GOOD
VOLTAGE OUTPUT
TEST 69 - CHECK
BATTERY
GOOD
CHARGER WIRING
PART 4
DC CONTROL
BAD
REPLACE
VERIFY BATTERY
CHARGE RELAY
WIRED
GOOD
CORRECTLY
(SEE TEST 66-
STEP 5)
BAD
REWIRE
REPAIR OR
REPLACE
BAD
WIRING
REPLACE BATTERY
GOOD
CHARGE REGULATOR