COSCO inverter maintenance
Model: MF5-37KW
Fault: overheat alarm
Failure analysis: this inverter customer reaction is running a few minutes on the reported overheating, to the scene to observe the inverter itself is not very hot, to exclude peripheral problems, is certainly a problem of overheating detection protection circuit. It is usually caused by damage to the aging of the heat exchanger and the failure of the components in the protection circuit. Thermal sensor is used more thermal resistance and thermal switch two. In the running process of overheating fault, in addition to overheating detection and protection circuit fault is mostly the frequency of the inverter cooling board overheating fault alarm. Also may be the cooling fan does not turn, the cooling fan does not turn the reason may be the cooling fan damage or to the cooling fan power supply fault. Cooling fan without drive power supply. Cooling fan running normally shows overheating fault, may be too high temperature or poor ventilation. The frequency converter and the cooling fan due to the accumulation of too much dust, wind, a serious reduction in the heat dissipation effect of the reasons for the poor. After the detection of temperature sensor fault, the replacement of the failure to remove. Running everything is normal.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw