Nilfisk-Advance 56206980 Service Manual page 13

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BATTERY CHARGER SERVICE MANUAL
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5-TRANSFORMER TESTING (continued)
• ALTERNATELY
The relay contacts can be bypassed to enable transformer testing when the battery system is not
present. Make up jumper leads (1 for 115 VAC, 2 for 230 VAC) with 3/16" (4.56 mm) wide flat blade
push in connectors on both ends of a piece of 14 gauge flexible wire (Fig. 5). Carefully disconnect the
AC cord lead and transformer primary lead (1 each 115 VAC, 2 each 230 VAC) from the relay terminals.
Connect the jumper lead (1 for 115 VAC, 2 for 230 VAC) according to the transformer test diagram on the
wiring diagram and parts list for the specific part number charger. Connect the AC power supply cord to
an outlet while recording the voltage reading and unplug as soon as the reading is noted (Fig. 5).
FIGURE 5. Transformer test.
D If the AC line fuse or circuit breaker blows, the transformer is shorted internally and must be replaced.
E Check the transformer secondary coil and capacitor coil voltage and compare to voltages on the trans-
former test diagram for the specific part number charger. If the voltages are substantially lower than
those shown, the transformer is shorted internally and must be replaced.
F If the secondary coil voltage and capacitor coil voltage check good, re-test the secondary coil voltage with
the correct capacitor connected. If the secondary coil voltage is the same measured with the capacitor
disconnected, the capacitor may be open, or the capacitor coil terminals may not be making proper
contact.
12 - FORM NO. 56041170 / BATTERY CHARGER SERVICE MANUAL / PARTS LIST
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Jumper
Lead
Connected
Capacitor
Leads
Disconnected
Jumper Leads