故障现象一 :加电、压缩机不启动 ,接线盒内冒烟。故障分析 :根据接线盒内附电路图 ,分析压缩机不启动的可能原因为 ( 1)热保护器损坏 ;( 2 )启动电路损坏。逐点测量 ,热保护器正常 ;启动电容Ｃｓ及运转电容Ｃｒ已烧坏。按原参数更换新品 ,通电试机 ,故障依旧。经仔细查找测量 Symptom 1: The power supply and compressor are not started and smoke is emitted in the junction box. Fault Analysis: According to the enclosed circuit diagram of the junction box, the possible reasons for the analysis of the compressor not starting up are (1) the thermal protector is damaged; (2) the starter circuit is damaged. Measured point by point, the thermal protector is normal; the starting capacitor Cs and the running capacitor Cr have been burned out. According to the original parameters to replace new products, power test machine, the fault remains. Carefully find the measurement