Troubleshooting - Yamaha VK540EF Service Manual

8E011

TROUBLESHOOTING

A
1. Connect:
S Pocket tester
(to battery terminals)
2. Measure:
S Battery voltage
S Fluid gravity
Battery voltage:
more than 12 V at 20_C (68_F)
B
1. Start the engine and accelerate to 3,000
r/min.
2. Measure:
S Charging voltage
Charging voltage:
13.3 X 14.3 V/3,000 r/min
CAUTION:
Never disconnect battery cables while
generator is operating or rectifier and
regulator will be damaged.
Correct connecter.
BATTERY IS NOT CHARGED.
OK
OK
CHARGING SYSTEM
OUT OF SPECIFICATIONS
S Check the battery.
S Replace and/or charge battery.
OUT OF SPECIFICATION
Check the fuse and charging coil.
OK
Replace the fuse, rectifier
and/or charging coil.
Replace voltage regulator.
7-25
ELEC
FAULTY