Periodic Inspection
6-2 MVX9000 User Manual
Maintenance and
Inspection
Modern AC drives are based on solid-state electronics technology. Preventive
maintenance is required to operate this AC drive in optimal condition, and to
ensure a long life. A monthly check up of the AC drive by a qualified technician is
recommended. Before the check up, always turn off the AC Input Power to the
unit. Wait at least 2 minutes after all display lamps have gone out, and then
confirm that the capacitors have fully discharged by measuring the voltage
between B1 and Ground using a multi meter set to measure DC.
Periodic Inspection
Check the following periodically to detect:
• Whether the motors are operating as expected.
• Whether the installation environment is abnormal.
• Whether the cooling system is operating as expected.
• Whether any irregular vibration or sound occurred during the operation.
• Whether the motors are overheating during the operation.
Note: Always check the input voltage of the AC drive with a Voltmeter.
Periodic Maintenance
1. Tighten the AC drive input and output power screws if necessary. These
screws might loosen due to vibration or temperature changes.
2. Check if the conductors or insulators are corroded and damaged.
3. Check the insulation resistance with Mega-ohm meters.
4. If the AC drive is not to be used for a long periods 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 at
least 5 hours before attempting to run a motor with it.
5. Clean off any dust and dirt with a vacuum cleaner. Place special emphasis on
cleaning the ventilation ports and PCBs. Always keep these areas clean, as
accumulation of dust and dirt can cause unforeseen failures.
WARNING!
Disconnect AC power before proceeding!
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