Hello,I am David,a technician of S&A chiller factory Now, I will show you the troubleshooting When the machine turned on but unelectrified The failure cause: Power cord is not plugged in place or fuse burnt-out IF the power cord is not plugged in place Please check and ensure the power interface and the power plug is plugged in place and in good contact If the fuse burnt-out Please open the electric box cover Check the protective tube Replace with spare one if necessary And check whether the power supply voltage is stable Check and ensure the power inferface and the power plug are in good contact If the fuse burnt-out again after replacing a new one Please check whether the internal parts are short-circuited Feel free to contact S&A after-sales dept. Thanks for using S&A chiller. CONTACT S&A TEL:+86-20-89301885, FAX:+86-20-84309967 SKYPE: teyuchiller Email:marketing@teyu.com.cn Website: http://www.teyuchiller.com