24.
Q
：
How to solve head light not bright or abnormal
？
A
：
While the unit turned on
，
press the power button
，
check if the headlight bright
，
if
not bright try more times
，
and clean the dust in the lamp holder
，
if still not bright
please contact service center.
25.
Q
：
How to solve can not brake
？
A
：
Follow the test step
：
1)
Check the electric brake
：
Turn on the unit
，
push the unit and lift the front
，
press
power button
，
and clamp brake
，
if the wheel stop means electric brake work OK
，
if not please contact service center.
2)
Check mechanical brake
：
Turn off the unit
，
clamp the brake and push the unit
，
if
there’s obviously resistance from rear wheel means mechanical brake work OK
，
