A39 UNIVERSAL SCR CHARGER INSTRUCTION MANUAL
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TROUBLESHOOTING
UNITS AC BREAKER TRIPS:
A) Check AC input voltage.
B) Check transformer tap setting.
DIGITAL DISPLAY FLASHING "0000"
WITH THE VOLTS LIGHT FLASHING AT A
ONE (1) SECOND INTERNAL:
A) The A39 not sensing battery
B) Blown DC fuse
BLOWN DC FUSE:
A) Check the batteries for proper hook up.
B) Reverse cells in the battery.
UNIT OUT OF PHASE:
A) Check AC input voltage and fuses.
B) Check SCR/Diode modules. (SEE BELOW)
C) Check S2A-123 printed circuit board.
D) Check S2A-122 printed circuit board.
TO TROUBLESHOOT MODULES:
A) Disconnect power transformer secondary wire
from top connection of module.
B) Disconnect positive wire from buss bar.
C) Disconnect negative wire from buss bar.
D) Disconnect 6 pin connector from terminal J3 on
S2A-122 assembly.
E) Measure resistance from top terminal of module
to center buss bar - must read high resistance.
Reverse leads must read high resistance.
F) Measure resistance from top terminal of module
to bottom buss bar - must read high resistance one
way; low resistance when you reverse leads.
CALL THE LA MARCHE SERVICE DEPARTMENT FOR ASSISTANCE IN TROUBLESHOOTING (847) 299-1188
