Automatic And Manual Timer Battery Charger Troubleshooting - Nilfisk-Advance 56206980 Service Manual

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AUTOMATIC TIMER BATTERY CHARGER TROUBLESHOOTING
Proper functioning of the Automatic Battery Charger is indicated by the following sequence of events. Three to
five seconds after the DC plug is connected to the charger receptacle the control relay "clicks" on, the trans-
former 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 Descrip1ion
Relay does not "click" on when DC plug is
connected to the charger receptacle.
Relay "clicks" on, but transformer does not
hum.
Transformer hums but no ammeter indication.
Transformer hums but charger output is low.
Fuse blows as soon as DC plug is connected
to the charger receptacle.
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.
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BATTERY CHARGER SERVICE MANUAL
Test Procedures / Section Number
Test for complete electrical connection to
batteries / 1.
Test for proper functioning of automatic timer
components / 2.
Test AC power circuit / 3.
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 Charger DC Circuit / 7.
Test Fuses and Diodes / 6.
Check Battery System Voltage / 8.
Test Automatic Timer Section for "Does Not
Turn Off" / 9.
FORM NO. 56041170 / BATTERY CHARGER SERVICE MANUAL / PARTS LIST - 5