LAUNCH KWB-421 Wheel Balancer User’s Manual
10
Use an unbalanced wheel for self-calibration
Locate the unbalanced point of the wheel rim before the operation begins and clip-on or adhere the 100g
lead block on this position.
Trouble shooting for the self-calibration
Error Description
Reasons
Solutions
Display “E-rr-8-“
1.Didn’t clip-on the 100g lead
2.The electric connect wire of the
pressure sensor is broken away
3. Computer board error.
1. Perform calibration with 100g of
standard lead
2.Check the connection and Connect
the electric wire
3. Change a computer board.
The self-calibration
performed by using a wheel has a
too big imbalance value
1.The wheel has a big error value
1.Use a balanced wheel
When the self-calibration ends,
there is too big imbalance value
for the 100g lead block or the
position is not on the positive
down or too many lead blocks
were used
1.The wheel has a big error value
or there are something else on
the wheel
2.Unstable displayed value
1.Change a wheel
2.Replace a new computer board
Contact the professional if above methods do not work.
Ⅳ
. Press “START” key, the wheel revolves and brakes
automatically. ‘CAL’-‘END’ displays on the control window. The
calibration is done.
Ⅴ
. Locate the unbalanced point of the wheel rim on the outside.
Turn the wheel to make all the indicator light. Make a marker with
chalk at the top position of the tire outer edge.
Ⅵ
. Following the procedure described in 5.1 “
Ⅰ
” and 5.1 “
Ⅱ
”,
clip-on or adhere the 100g lead block on this marked position.
