Shenzhen ITLONG Intelligent Technology CO. LTD HLD-DT-A Manuel D’Utilisation

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5.2 
The common sense of hardware’s maintenance
 
1.Regularly  clean  the  dust  of  controller,  PCBA  Board  and  other 
parts and components; 
2. Regularly check if the controller work normally. 
3.Regularly check if all the wiring are in good status