2
Nautilus® Commerical Series Bike Service Manual
Battery Charge Testing
Battery
Charge
Testing
Due to requiring many pieces of test equipment, this procedure does not test the complete functionality of the charger but rather its final "float" state.
If the battery voltage is less than 3V, no more than 50mA is applied. From 3V to 6.8V current control applies nearly .4A until voltage control or float
state is entered.
Batteries can only be tested under load. Even if it measures 6V or more unloaded, it can still produce little or no voltage under load as a defective
battery's internal impedance increases.
Apply power to the
bike from the
external power
supply, first
confirming AC
voltage is present
Remove the
battery connector
from the 27451
PCB at location J1
Is
the voltage 6.8V
+/- 3%
Yes
Measure the
voltage on the
27451's J1 pins 2
and 3
Replace the
battery
No
Replace the 27451
PCB
Measure the
voltage on test
points 1 and 3 of
the 27451
Is
the voltage 9V
+/- 10%
Yes
No
General bike
electrical testing
Unplug the
external power
supply cable at
location J3
Is
the voltage 9V
+/- 10%
Yes
Replace the 27451
PCB
Measure the
voltage of the
contacts of this
connector on pins
1 and 2
No
Unplug the power
supply and
measure its
voltage on pins 1
and 2
Is
the voltage 9V
+/- 10%
Yes
No
Replace the
external power
cable
Replace the power
supply
General bike
electrical testing
Charge the battery
for 8 hours, or until
6.8V is achieved
Charge the battery
for 8 hours, or until
6.8V is achieved
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