5. Clean the dust on PCBs and air ducts with a vacuum cleaner;
6. For drives that have been stored for a long time, it must be powered on every 2 years. When supplying AC
power to the drive, use a voltage regulator to raise the input voltage to rated input voltage gradually. The
drive should be powered for 5 hours without load.
7. Before performing insulation tests, all main circuit input/output terminals should be short-circuited with
conductors. Then proceed insulation test to the ground. Insulation test of single main circuit terminal to
ground is forbidden; otherwise the drive might be damaged. Please use a 500V Mega-Ohm-Meter.
8. Before the insulation test of the motor, disconnect the motor from the drive to avoid damaging it.
Note：
Dielectric Strength test of the drive has already been conducted in the factory. Do not do the test again,
otherwise, the internal components might be damaged.
Using different component to substitute the original component may damage the driver.
8.3 Replacing Wearing Parts
The components that are easily damaged are： cooling fan and electrolytic capacitors of filters. Their lifetime
depends largely on their application environment and preservation. Normally, lifetime is shown in following
table.
Table 8-2 Lifetime of components
You can decide the time when the components should be replaced according to their service time.
1. Cooling fan
Possible cause of damages： wear of the bearing, aging of the fan vanes.
Criteria ： After the drive is switched off, check whether abnormal conditions such as crack exists on fan
vanes and other parts. When the drive is switched on, check whether drive running is normal, and check
whether there is any abnormal vibration.
2. Electrolytic capacitors
Possible cause of damages： high ambient temperature, aging of electrolyte and large pulse current caused
by rapid changing loads.
Criteria ： Check if there is any leakage of liquids. Check if the safety valve protrudes. Measure static
capacitance and insulation resistance.
3.Relay
Possible cause of damages： corrosion, frequent-switching.
Criteria： Check whether the relay has open and shut failure.
8.4 Storage
The following points must be followed for the temporary and long-term storage of drive：
1. Store in locations free of high temperature, humidity, dust, metal powder, and with good ventilation.
2. Long-term storage will cause the deterioration of electrolytic capacitors. Therefore, the drive must be
switched on for a test within 2 years at least for 5 hours. The input voltage must be boosted gradually by the
voltage regulator to the rated value.
To Next Page
Loading...
Need help?
General
