Yamaha EF7000 Service Manual page 99

BATTERY (EF7000E/EF7200E/EF7200DE)
d. Adjust the voltage so that the current is at
the standard charging level.
e. Set the time according to the charging time
suitable for the open-circuit voltage.
f. If charging requires more than 5 hours, it is
advisable to check the charging current
after a lapse of 5 hours. If there is any
change in the amperage, readjust the volt-
age to obtain the standard charging current.
g. Measure the battery open-circuit voltage
after leaving the battery unused for more
than 30 minutes.
12.8 V or more --- Charging is complete.
12.7 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery.
Charging method using a constant voltage
charger
a. Measure the open-circuit voltage prior to
charging.
TIP
Voltage should be measured 30 minutes after
the engine is stopped.
b. Connect a charger and ammeter to the bat-
tery and start charging.
c. Make sure that the current is higher than
the standard charging current written on the
battery.
TIP
If the current is lower than the standard charg-
ing current written on the battery, This type of
battery charger cannot charge the VRLA
(Valve Regulated Lead Acid) battery. A varia-
ble voltage charger is recommended.
d. Charge the battery until the battery's charg-
ing voltage is 15 V.
TIP
Set the charging time at 20 hours (maximum).
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ELEC