Guardian 4389 Repair Manual page 98

SECTION 4.3
TROUBLESHOOTING FLOW CHARTS
FUSE BLOWS
IMMEDIATELY WHEN
FUSE BLOWS WHEN
PLACED IN "AUTO" OR
Problem 17 - 5 Amp Fuse (F2) Blown (If Equipped)
IF BATTERY SOURCE IS REVERSED, T HE 5A FUSE WILL OPEN IMMEDIATELY.
7.5 AMPS. IF THE ACCESSORY TO BE USED THROUGH THIS CIRCUIT DEMANDS
TOO MUCH POWER, THE FUSE THAT PROTECTS THIS CIRCUIT WILL OPEN.
AND THE 12 VDC ACCESSORY SOCKET FOR A SHORT TO GROUND.
Page 96
Problem 16 - 15 Amp Fuse (F1) Blown
REPLACED
"MANUAL"
CHECK BATTERY CONNECTIONS FOR PROPER POLARITY.
INSTALL NEW 5A FUSE AND RETEST
TEST 66 - CHECK AC
PROCEED WITH TEST 66 RESULTS
Problem 18 - 7.5 Amp Fuse (F2) Blown (If Equipped)
THE 12 VDC ACCESSORY OUTLET IS CAPABLE OF DELIVERING A MAXIMUM OF
CHECK FOR OVERLOAD CONDITION.
INSTALL NEW FUSE AND RETEST.
IF FUSE STILL MELTS OPEN CHECK WIRE 15 BETWEEN 7.5A(F2) FUSE HOLDER
Problem 19 - Generator Will Not Exercise
TEST 77 - TEST
BATTERY VOLTAGE
RUNNING CIRCUITS
FUSE BLOWN
VOLTAGE AT
GOOD
BATTERY CHARGER
BAD
EXERCISE
FUNCTION
PART 4
DC CONTROL
TEST 75 - CHECK
CIRCUIT
TEST 76 - CHECK
CRANKING AND
REPLACE
BATTERY
CHARGER