TROUBLESHOOTING GUIDE
FOREWORD
Problem Cause
Solution
Battery gauge
does not
register
anything when
vehicle is on.
1. Loose connection
near the power switch
or battery pack.
2. Battery is completely
discharged.
1. Check the connections,
reconnecting any that are
loose.
2. Charge the battery.
Battery gauge
registers but
vehicle still
does not work.
1. Motor wire is loose
or disconnected.
2. Throttle is defective.
3. Controller is
defective.
1. Send to service to
repair the wiring.
2. Replace Throttle
3. Replace Controller.
Clicking noise
coming from
motor.
1. Chain is loose.
2. Magnets in motor
have come loose.
1. Adjust the chain.
2. Send to customer
service to replace a new
motor.
Vehicle does
not stop when
Throttle returns
to original
position.
Controller or Throttle is
defective.
Replace Controller or
Throttle. Customer
service can assist in
diagnosis.
Vehicle is
losing speed.
1. Battery is low.
2. Defective battery.
3. Defective Throttle.
1. Charge battery.
2. Replace battery.
3. Replace Throttle
Distance per
charge is
reduced.
1. Tire pressure is low.
2. Battery is not fully
charged.
3. Battery is damaged.
4. Headwind, slopes,
overloading, etc.
1. Fill Tires with sufficient
pressure.
2. Charge battery for 6-8
hours.
3. Replace Battery
4. Reduce these factors.
Battery could
not be
charged.
1. Loose wiring near the
charging socket.
2. Loose wiring in
battery pack.
3. Defective Charger.
1. Check the wiring, re-
establish connection.
2. Send to a qualified
service technician.
4. Replace Charger.
The Expresso is a highly stylish, environmentally
friendly, fossil-fuel-free personal transportation device,
incorporating these advanced-design components:
Æ
Highly efficient brushless DC motor.
Æ
Controller with battery indicator and protection
from over voltage and under voltage.
Æ
Brake system with power cut-off, for safe riding.
Æ
48V 14Ah high performance battery, delivering
stronger current and longer range.
Æ
Front and rear suspension system providing a
smooth and comfortable ride.
Æ
Front and rear tires are pre-charged with sealant,
protecting against thorn punctures.
RIDING SAFETY
Like any sport, bicycling carries the risk of injury and
damage. By choosing to ride the Expresso, you assume
all responsibility for these risks. Thus, you need to
know and practice the rules of safe and responsible
riding.
YOUR INSURANCE POLICIES MAY NOT PROVIDE
COVERAGE FOR ACCIDENTS INVOLVING THE USE OF
THIS BICYCLE. TO DETERMINE IF COVERAGE IS
NOTE: if other problems occur, do not attempt to disassemble
the electric bicycle on your own, please proceed to the bicycle
dealer or to call Customer Service.
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