INSTRUCTION / TROUBLESHOOTING MANUAL FOR MODEL A75M
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Problem: Failure light on CODE 0003.
1.
Check battery for correct number of cells.
2.
Check for defective or shorted cells in battery.
3.
Open circuit battery voltage must be above 1.6Vpc..
Problem: Failure light on CODE 0004.
1.
Check battery for defective or shorted cells.
2.
S2A-320 or FC6 "p.c." board may be defective.
3.
80% setting came on late into the charge cycle, batteries are being discharged beyond
specifications.
Problem: Fuses, battery, AC voltage and taps okay, but no indication
on display board.
Defective S2A-191 board, replace board.
TROUBLESHOOTING
SCR/DIODE MODULES A75M - 3 PHASE
1.
Disconnect power transformer secondary wire from top connection of module.
2.
Disconnect positive bus bar from module.
3.
Disconnect negative bus bar from module.
4.
Disconnect 6 wires from terminal P1 on FC6 Assembly.
MAGN-A-PAK Power Module Version:
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.
Hockey Puk Version:
5. Measure the resistance across the plates of SCR (where gate/cathode wires are attached). Each
should have high resistance on both directions.
6. Measure the resistance across the plates of diode. Each should have high resistance one way, low
resistance the other way.
