TYPICAL BATTERY CHARGER
TROUBLESHOOTING DIAGRAM

PRELIMINARY: TURN OFF AC BREAKER DISCONNECT LOAD TURN ON AC BREAKER		TOOLS: SCREWDRIVERS DIGITAL MULTIMETER PROPER LOAD
		POSSIBLE CAUSES
DOES THE BREAKER TRIP (FUSE BLOW) IMMEDIATELY?		IMPROPER AC LINE VOLTAGE SHORTED RECTIFIER SCR FAULTY AC BREAKER SHORTED TRANSFORMER WINDING SHORTED SURGE SUPPRESSOR
IS AC POWER LED LIT?		FAULTY LED CIRCUIT FAULTY LED
IS THERE OUTPUT VOLTAGE?		LOSS OF AC POWER TRIPPED BREAKER OR BLOWN FUSE FAULTY CONTROL CARD LOOSE CONNECTION FAULTY VOLTMETER OPEN TRANSFORMER WINDING OPEN CHOKE BOTH SCRs OPEN
IS THE OUTPUT VOLTAGE THE CORRECT VALUE?		INCORRECT FLOAT OR EQUALIZE SETTINGS ONE SCR OPEN LOOSE CONNECTION FROM (+) OUTPUT TO PIN 12 ON CONTROL CARD FAULTY CONTROL CARD INCORRECT VOLTAGE PROGRAM RESISTOR FAULTY TRANSFORMER
IS THE OUTPUT RIPPLE WITHIN LIMITS?		SHORTED CHOKE FAULTY CAPACITOR IMPROPER FILTER CIRCUIT
IS VOLTAGE REGULATION WITHIN LIMITS?		FAULTY CONTROL TRANSFORMER FAULTY CONTROL CARD LOOSE CONNECTION FROM POWER XFRMR TAPS 15 AND 16 THRU CONTROL XFMR TO CONTROL CARD
TURN OFF AC BREAKER CONNECT LOAD TURN ON AC BREAKER
IS OUTPUT VOLTAGE STILL CORRECT?		UNIT IN CURRENT LIMIT
IS OUTPUT CURRENT CORRECT?		UNIT IN CURRENT LIMIT IMPROPER LOAD FAULTY CONTROL CARD LOOSE WIRE CONNECTIONS FROM SHUNT TO CARD
DOES CURRENT LIMIT?		IMPROPER LOAD FAULTY CONTROL CARD LOOSE WIRE CONNECTIONS FROM SHUNT TO CARD
UNIT WORKS PROPERLY!