Issue
Potential Cause
Solutions
Failed speed
change, or very
low velocity.
• Low Battery Voltage.
• Bad governor handle.
• Bad controller.
• Charge the battery.
• Replace the governor
handle or controller.
Motor does not
work when the
power is turned
on.
• Bad governor handle.
• Bad electric door lock
and contact point.
• Bad controller.
• Replace the governor
handle or controller.
• Re-weld the contact
part.
Inadequate
mileage from
charge.
• Tires have low air pressure.
• Inadequate charging or
charger failing.
• Damaged or expired bat-
tery.
• Frequent breaking and
restarting.
• Pump the tires to
proper pressure.
• Recharge the bat-
tery.
• Replace the battery
or charger.
The charger no
longer works with
the battery.
• Charger wiring is loose or
damaged.
• The battery weld line is
damaged or fell off.
• Weld the connecting
line, or replace it.
The booster has
no power assist.
• The induced cartridge
has poor contact or is
damaged.
• The booster wiring is bad
or damaged.
• Adjust the induced
cartridge or replace
it.
• Reconnect the boost-
er or replace it.
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TROUBLESHOOTING