论文部分内容阅读
故障现象 1:将UPS接通220V市电时,3A保险丝熔断;当换保险后逆变时只有180V输出,机内听到有“咕咚咕咚”的响声。 故障检查:检查电源线、电源开关正常;电瓶电压25V正常。接通市电后,打开UPS电源开关,3A保险丝熔断,说明机内有短路现象。将插头拔下,换上3A保险管,在逆变状态下开机,机内发出“咕咚咕咚”的声响,用万用表测UPS输出插座孔,测得其交流电压为180V。为了慎重起见:将UPS主板卸下,把最容易坏的零件仔细检测,结果所有元器件完好,最后
Symptom 1: When the UPS is connected to the 220V mains, the 3A fuse blows; when the inverter is replaced, only 180V is output when the inverter is in reverse. The machine can hear the sound of “Gudonggudong”. Troubleshooting: Check the power cord, the power switch is normal; battery voltage 25V normal. Connected to the electricity, open the UPS power switch, 3A fuse blown, indicating a short circuit within the machine. The plug unplugged, put 3A fuse, turn on the inverter state, the machine issued a “Gudong boom” sound, with a multimeter to measure UPS output jack hole, measured the AC voltage is 180V. For the sake of caution: the UPS motherboard removed, the most vulnerable parts carefully tested, the results of all the components intact, and finally