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9.1 Pay attention to protect from ingress of water and immersion in water, which may damage the controller.
Note: If you think water may have got into the control box, please switch off the power
immediately and pedal without electric assistance. You can pedal with electric assistance as soon as the
controller has dried out.
9.2 Pay attention to protect from any strong shaking and punching, which may damage this controller
9.3 The controller should be used in normal working temperature range from -15°C to +40°C
Warning: Do not open the controller box. Any attempt to open the controller box, modify
or adjust the controller will void the warranty. Please ask your local dealer or authorized service
specialist to repair your bike.
10. Maintaining the power-off control of the brake lever*
This is a very important component for riding with safety. First, you should pay attention to protect it from
impact and avoid any damage. Second, make regular check on all bolts and nuts, and fasten them securely.
11. Simple trouble shooting
The information below is for purpose of explanation, not as a recommendation for user to carry out repair. Any
remedy outlined must be carried out by a competent person who is aware of the safety issues and sufficiently
familiar with electrical maintenance.
Trouble description
After the main battery
switched on, the motor
does not generate
assistance when pedaling.
The distance per charge
becomes short (Note:
performance of the bike
battery is directly related to
weight of the rider and any
baggage / load / wind / road
/ constant braking).
Possible causes
1)the motor cable (waterproof
connection joint) is loose; 2)
brake lever did not return well,
which keeps the switch in "power
off" position; 3) battery fuse is
broken; 4) the speed sensor
is too far away from the magnetic
ring on the B.B. axle; 5) the
connection between the sensor
and the controller is loosen or not
connected well.
1) charging time is not enough; 2)
the environment temperature is
so low that it affects the battery
working. 3) frequently going
uphill, or riding with head wind,
or on poor road condition, 4) the
tyres have low pressure (to be
Trouble shooting
First of all, please check the battery if it
is empty. If yes, charge the battery
immediately. 1) check if the connection
is securely fixed. If loose, joint them
tightly. 2) make the brake lever come
back to its normal position with care,
without braking; 3) open the battery
pack top, and check if the
broken. If yes, please visit your vendor
or authorized service for installing a
new fuse; 4) adjusting the distance
between the magnetic ring and the
sensor, to make sure the distance is
within 3mm; 5) fix tight the connection
between the sensor and the controller.
1) please charge the battery according
the instruction (chapter 7.3); 2) in
winter or under 0°C, you'd better store
the battery inside the house; 3) it will
be normal if the riding conditions are
improved as regular; 4) pump the tyres
and ensure tyres are fully inflated to
fuse is
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