Carrier VECTOR 1550 Series - Page 256

62-61753-21
10-4
INDICATION/
TROUBLE
POSSIBLE CAUSES
REFERENCE
SECTION
10.2 BATTERY CHARGER
Input fuse blows when charger is
turned on
Short in 12 volt wiring causing
overload of charger
Locate and re-
move short
Input fuse blows repeatedly, even
when not connected
Internal short
Replace
Charger does not taper back after
charging for a few minutes
Bad cell in battery
Test battery for
defect according
to battery manu-
facturer’s instruc-
tions
Defective charger
Replace
Charger does not charge
Open input fuse
Charger is not receiving AC input
Replace.
Using a voltme-
ter, confirm
charger is receiv-
ing correct (nom-
inal) 380V AC. If
not check input
connections.
Charger output is not connected to 12 volt battery
Check output
wiring connec-
tions to battery.
Defective charger
Replace
Low output voltage measured
across charger output
Battery not connected to charger. It is
normal to measure 12 volts or less across
charger output with no battery connected
Check charging
leads from
charger to battery
Reverse polarity connection to
battery has caused charger to
stop charging
Internal DC fuse blown and possible
damage to current carrying components
Replace