VM1000 Series
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• Check whether the screws become loose.
• Check whether the AC drive is corroded.
• Check whether the wiring terminals show signs of arcing;
1.8.3 The Replacement of Vulnerable Components
The vulnerable components of the AC drive are cooling fan and filter electrolytic
capacitor. Their service life is related to the operating environment and
maintenance status. Generally, the service life is shown as follows:
Components name Lifetime
Fan 2 ～ 3 Year
Electrolytic capacitor 4 ～ 5 Year
Table 1-5 Lifetime of Wearing Parts
User can decide the replacing time according to its operation
(1) Cooling Fan
Damage causes: bearing wear, leaf aging
Judge standard: whether there is crack on the fan blase; whether there is abnormal
vibrating when turn on
(2) Filter Electrolytic Capacitor
Damage causes: the quality of input power is bad; the ambient temperature is relatively high;
frequent load jump, electrolyte aging
Judge standard: Whether there is liquid leakage or protrusion of safety valve or not,
electrostatic capacitance and insulation resistance measurement.
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