Nilfisk-Advance 56206980 Service Manual page 7

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BATTERY CHARGER SERVICE MANUAL
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MANUAL TIMER BATTERY CHARGER TROUBLESHOOTING
Proper functioning of the charger is indicated by the following sequence of events. When the timer knob is
turned to "ON", the transformer hums and the ammeter registers proper charge.
Proper diagnosing and repair requires identifying the malfunction from the following list, performing the indi-
cated tests and repairing or replacing the malfunctioning items.
Malfunction Description
Transformer does not hum when the timer is
turned to "ON".
Transformer hums but no ammeter indication.
Transformer hums but charger output is low.
Fuse blows as soon as the charger is
connected to the batteries.
Ammeter remains pegged at maximum charge
for more than 30 minutes.
Charger does not turn off.
WARNING!
Do not touch the battery terminals or contacts on the charging plug. An electrical shock could result.
6 - FORM NO. 56041170 / BATTERY CHARGER SERVICE MANUAL / PARTS LIST
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Test Procedures / Section Number
Test AC Power Circuit / 3.
Test for complete electrical connection
to battery system / 1.
Test Charger DC Circuit / 7.
Test Fuses and Diodes / 6.
Test Capacitor / 4.
Test Transformer / 5.
Test Fuses and Diodes / 6.
Test Transformer / 5.
Test Fuses and Diodes / 6.
Check Battery System Voltage / 8.
Replace Manual Timer.