Generally, the characteristics of frequency converter failure or damage can be divided into two categories: one is the phenomenon of frequent automatic shutdown in operation, accompanied by a certain fault display code, and its treatment measures can be handled and solved according to the guiding methods provided in the random manual. This kind of fault is generally a kind of protective action phenomenon caused by improper setting of operating parameters of the inverter, or external working conditions and conditions can not meet the requirements of the inverter. The other is sudden failures such as short circuit caused by harsh use environment, high temperature and conductive dust, insulation reduction or breakdown caused by humidity (in severe cases, there will be abnormal phenomena such as ignition and explosion).
The specific performance is as follows:
A, inverter main control circuit failure.
Second, the inverter cooling DC fan failure.
Three, inverter peripheral control device failure.
Fourth, the design of the inverter cabinet is unreasonable, the interior is too narrow, and the heat dissipation and ventilation effect is poor, resulting in poor heat dissipation.
Five, the inverter daily maintenance work can’t keep up.