12
Maintenance and Inspection
Daily
Annual
• Ambient temperature, humidity, speck, dust or foreign object
• Abnormal vibration and noise
• Main circuit voltage
• Odor
• Lint or other particles at air holes
• Cleanness at front portion of the driver and connecter
• Damage of the cables
• Loose connection or misalignment between the motor and
machine or equipment
• Pinching of foreign object at the load
• Loose tightening
• Trace of overheat
• Damage of the terminals
Type
Cycles
Items to be inspected
Daily
inspection
Periodical
inspection
• Routine maintenance and inspection of the driver and motor are essential for the proper and safe operation.
Notes on Maintenance and Inspection
1) Turn on and turn off should be done by operators or inspectors themselves.
2) Internal circuit of the driver is kept charged with high voltage for a while even after power-off. Turn off the
power and allow 15 minutes or longer after LED display of the front panel has gone off, before performing
maintenance and inspection.
3) Disconnect all of the connection to the driver when performing megger test (Insulation resistance mea-
surement) to the driver, otherwise it could result in breakdown of the driver.
Inspection Items and Cycles
General and normal running condition
Ambient conditions : 30˚C (annual average), load factor of 80% or lower, operating
hours of 20 hours or less per day.
Perform the daily and periodical inspection as per the items below.
<Note> Inspection cycle may change when the running conditions of the above change.
