www.simutechmultimedia.com
Maintenance and Inspection
Modern AC drives are based on solid state electronics technology. Preventive maintenance is required to operate the
SIMVFD in its optimal condition and to ensure a long life. It is recommended that a qualified technician perform a
regular inspection of the SIMVFD. 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, and wait at least two minutes after all
display lamps have turned off.
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 or damaged.
3. Check the resistance of the insulation with a mega-ohmmeter.
4. Check 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.
