检查过程：由于这几台VLT3000变频器是小功率的，因此拆装非常的方便。
Inspection process: because this several sets of VLT3000 inverter is small power, and therefore disassembling very convenient.
先检查变频器的主回路，测量整流模块和逆变模块特性良好。
Check the main loop and measurement frequency inverter modules and rectifying module properties is good.
每次维护变频器后，要认真检查有无遗漏的螺丝及导线等，防止小金属物品造成变频器短路事故。
After each maintenance frequency converter, carefully examined for missing screws and wire etc., to prevent small metal objects cause short-circuit accident frequency converter.
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