Maintenance and Inspection
Modern AC drives are based on solid state electronics technology. Preventive
maintenance is required to operate the AC drive in its optimal condition, and to
ensure a long life. It is recommended that a qualified technician perform a regular
inspection of the AC drive. Some items should be checked once a month, and
some items should be checked yearly. Before the inspection, always turn off the
AC Input Power to the unit. Wait at least 2 minutes after all display lamps have
turned off.
WARNING! Disconnect AC power and ensure that the internal capacitors have fully
discharged before inspecting the AC drive!
Monthly Inspection:
Check the following items at least once a month.
1. Make sure the motors are operating as expected.
2. Make sure the installation environment is normal.
3. Make sure the cooling system is operating as expected.
4. Check for irregular vibrations or sounds during operation.
5. Make sure the motors are not overheating during operation.
6. Check the input voltage of the AC drive and make sure the voltage is within the
operating range. Check the voltage with a voltmeter.
Annual Inspection
Check the following items once annually.
1. Tighten and reinforce the screws of the AC drive if necessary. They may loosen
due to vibration or changing temperatures.
2. Make sure the conductors and insulators are not corroded and damaged.
3. Check the resistance of the insulation with Megaohmeter.
4. Check the the capacitors and relays, and replace if necessary.
5. Clean off any dust and dirt with a vacuum cleaner. Pay special attention to
cleaning the ventilation ports and PCBs. Always keep these areas clean.
Accumulation of dust and dirt in these areas can cause unforeseen failures.
If the AC drive is not used for a long period of time, turn the power on at least
once every two years and confirm that it still functions properly. To confirm
functionality, disconnect the motor and energize the AC drive for 5 hours or more
before attempting to run a motor with it.
Chapter 6: Maintenance and Troubleshooting
GS1 Series AC Drive User Manual
6–2
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