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LAUNCH                                                          KWB-421 Wheel Balancer User’s Manual 

12 

Error 

Descriptions 

Reasons 

Solutions 

The electric machine 
can stop over ten 

seconds after the 
“START” key is pressed 
and there is a reading 

displayed on the 
window. But there is no 
brake signal.       

1. The power board is damaged. 
2. There is a disturb. 

1. Change a power board. 
2. Turn off the machine then reset it. 

The balanced value is 
unstable. It is very hard 
to get the value “00”.     

1. The sensor is wet or it is damaged. 
2. The program is disordered. 

1. Readjust it, drying it and re-do 
self-calibration or change a sensor. 
2. Re-do self-calibration. 

The balancer can not 

brake when the value 
displayed. 

1. The brake system is damaged. 

2. There is a disturb. 

1.Change a power board. 

2.Reset the machine. 

There is a difference 
value over 10g when the 
wheel is removed and 

installed. 

1. The inner bore of the wheel is not 
clear or neat. 
2. The adaptor is not well installed. 

1.Change a wheel 
2. Check the installed surface. 

Err8 displayed when 
self-calibration is done. 

See 5.1 

 

Imbalance value 
exceeds hundreds of 
grams 

1. These three EMS memory 

parameters are disordered. 
2. The error value of the wheel is too 
big.   

1. Readjust the value to the standard 
value in term of the manual. 
2.Change a wheel   

 

Contact the professional for the problems could not be resolved by above methods. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for KWB-421

Page 1: ...V1 00 000 2018 08 18...

Page 2: ...purposes only and the registered trademark ownership belongs to original companies This equipment is intended for use by technical professionals or maintenance personnel Trademark Information is a reg...

Page 3: ...d Installation 3 2 1 Haulage and installation of the machine 3 2 2 Recommendations 4 3 Cotrol Panel 4 4 Operation 5 4 1 Wheel Mounting 5 4 2 Input the Wheel Data 6 4 3 Balance Mode Selection 7 4 4 Whe...

Page 4: ...lf calibration and full automatic failure diagnosis function 1 3 Technical Data Max wheel weight 65kg Max tire diameter 650mm Power supply 220V Noise 70dB Balancing accuracy 1g Rim width 1 5 18 Rim di...

Page 5: ...s termly The machine operator should not wear necktie long hair or loose cloth She or he should stand at the side face of the machine and make sure that unauthorized personnel do not approach the mach...

Page 6: ...ers for weight fixing removing or any other pointed objects 4 Operation Turn on the main power the balancer begins the interior self diagnostic program If A 8 0 is displayed on the display window the...

Page 7: ...attention to the direction else measurement error could be possible 4 2 Input the Wheel Data I Input the measurement data A II Input measurement data L On the measure statue pull out the slide ruler...

Page 8: ...r key to plus or minus a defined value to change the displayed figure till equal to the d figure Dynamic balance This is used in testing dynamic imbalance when the wheel running and to eliminate the i...

Page 9: ...For example outside screen displays 10g inside screen displays 40g outer imbalance value inner imbalance value Turn the wheel slowly by hand to locate the balanced point make sure that all the balanc...

Page 10: ...s plant This operation could be re do if the machine services too many years or the spares are charged or there is a big imbalance value Install a middle scale wheel which has a rim diameter 13 or 14...

Page 11: ...lue 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...

Page 12: ...ed forward the sensor is wrong 1 Adjust the phase 2 Readjust the position or change another one Err5 displayed The wheel shield is not put down Put down the shield Err7 displayed EMS memory data lose...

Page 13: ...a sensor 2 Re do self calibration The balancer can not brake when the value displayed 1 The brake system is damaged 2 There is a disturb 1 Change a power board 2 Reset the machine There is a differenc...

Page 14: ...LAUNCH KWB 421 Wheel Balancer User s Manual 13 6 The Wiring Diagram of the Power Board Connected to transformer...

Page 15: ...ative of LAUNCH has any authority to bind LAUNCH to any affirmation representation or warranty concerning LAUNCH products Declaration The above warranty is able to replace any warranty in other forms...

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