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Table 8-2 Component life
Part name Service Life
Fan 30,000~40,000 hours
Electrolytic capacitor 40,000~50,000 hours
Relay About 100,000 times
Users can determine the replacement time according to the running time.
1. Cooling fan
Possible damage causes: wear of the bearing, aging of the vanes.
Judgment standard: whether there is crack on the blade and whether there is any abnormal vibration or
noise.
2. Electrolytic capacitor
Possible damage causes: high ambient temperature, increased pulsating current caused by rapid
changing load, electrolyte aging.
Judgment standard: whether there is liquid leakage, whether the safety valve has protruded, measure the
static capacitance, measure the insulating resistance.
3. Relay
Possible damage caused: erosion, frequent actions.
Judgment standard: whether it can be opened and closed properly.
8.4 Storage of drive
Note the following for the temporary and long-term storage of the drive:
1. The drive should be stored in the places away from high temperature, dampness, dust and metal
powder. There should be good ventilation there.
2. Long-term storage will degrade the electrolytic capacitor. The drive should be powered on once within
2 years at least for 5 hours. The input voltage should be raised slowly to the rated value with the regulator
upon power-up.
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