| 
 fault  | 
 cause  | 
 solution  | 
| 
 no display  | 
 ●no power supply ●fuse broken ●damaged AC/DC adaptor  | 
 ●plug in power cord ●change fuse ●replace adaptor ●Broken again after changing, be repaired in the maintenance dept. 
  | 
| 
 unstable display value  | 
 ●bad work environment ●weighing room door not close properly ●touching of pan with machine shell or foreign matter between them ●unstable power supply, beyond allowable value ●unstable weighed object(as it absorbed moisture or moisture evaporated)  | 
 ●improve the work environment, keep away from vibration and airflow disturbance ●Take out the foreign matter. Turn the pan avoiding the touch. 
 ●Connect an external AC power regulator  | 
| 
 Discrepancy between displayed value and actual weight  | 
 ●Not calibrate ●No zero clearing before weighing ●Not adjust level  | 
 ●Calibrate the balance ●Press TARE key for zero clearing ●Adjust the level  |