INSTRUCTION / TROUBLESHOOTING MANUAL FOR MODEL A70B
PAGE 13 OF 16
Problem: Failure light on CODE 0004.
1.
Check battery for defective or shorted cells.
2.
S2A-122A "p.c." board may be defective.
3.
80% setting came on late into the charge cycle, batteries are being discharged beyond
specifications.
Problem: Failure light on CODE 0005.
1.
Defective S2A-122A "p.c." board, replace board.
2.
Defective batteries.
3.
Settings on the S2A-122A "p.c." board.
Problem: Failure light CODE 0006.
1.
Check for defective or shorted cells in battery.
2.
Check finish rate of charger.
Problem: Fuses, battery, AC voltage and taps okay, but no indication
on display board.
Check voltage across capacitor C-1 on S2A-122A drive board. Voltage should be approximately 12Vdc., if
voltage is zero replace both the S2A-122A & S2A-146 "p.c." boards. If 12 volts is present, replace the S2A-146
board.
TROUBLESHOOTING
SCR/DIODE MODULES A70B - 3 PHASE
1.
Disconnect power transformer secondary wire from top connection of module.
2.
Disconnect positive buss bar from module.
3.
Disconnect negative buss bar from module.
4.
Disconnect 6 pin connector from terminal J3 on S2A-122A Assembly.
5.
Measure resistance from top terminal of module to center - terminal must read high resistance.
Reverse leads must read high resistance.
6.
Measure resistance from top terminal of module to bottom - terminal must read high resistance
one way; low resistance when you reverse leads.
