Retrospec KOA REV+ Assembly Instructions Manual page 34

16. Simple Troubleshooting
The information below is for diagnosing problems only. It is not a recommendation
for the user to carry-out repairs. Any remedy outlined must be carried out by a
professional e-bike repair person who is educated on the safety issues with bikes
& e-bikes.
Trouble Description Possible Causes Trouble Shooting
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).
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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) the speed sensor
is too far away from the
magnetic ring on the B.B.
axle; 4) 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 tires have low pres-
sure (to be inflated);
5) frequently braking and
starting. 6) battery has been
stored without using for
quite a long time.
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) adjusting the
distance between the
magnetic ring and the
sensor, to make sure the
distance is within 3mm;
4) 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, store the
battery inside the house; 3)
it will be normal if the riding
conditions are improve
and hills are avoided; 4)
Inflate the tires and ensure
tires are fully inflated to
recommended pressure for
your bike; 5) Less frequen
stop and go will result in
improved range; 6) make
regular charging according
to this instruction manual
(refer to Chapter 6.3) If the
above has no effect, please
contact your vendor or
authorized service.