Inspection Item; Daily Inspection; Periodic Inspection; Daily And Periodic Inspection - Mitsubishi Electric FR-CS84-012 Instruction Manual

7
PRECAUTIONS FOR MAINTENANCE AND
INSPECTION
This chapter explains the precautions for maintenance and inspection of this product.
Always read the instructions before use.
7.1

Inspection item

The inverter is a static unit mainly consisting of semiconductor devices. Daily inspection must be performed to prevent any fault
from occurring due to the adverse effects of the operating environment, such as temperature, humidity, dust, dirt and vibration,
changes in the parts with time, service life, and other factors.
 Precautions for maintenance and inspection
When accessing the inverter for inspection, wait for at least 10 minutes after the power supply has been switched OFF. Then,
make sure that the voltage across the main circuit terminals P/+ and N/- on the inverter is not more than 30 VDC using a tester,
etc.
7.1.1

Daily inspection

Basically, check for the following faults during operation.
• Motor operation fault
• Improper installation environment
• Cooling system fault
• Abnormal vibration, abnormal noise
• Abnormal overheat, discoloration
7.1.2

Periodic inspection

Check the areas inaccessible during operation and requiring periodic inspection. Consult us for periodic inspection.
Check and clean the cooling system:
clean the air filter, etc.
Check the tightening and retighten: the
screws and bolts may become loose due
to vibration, temperature changes, etc.
Check and tighten them.
Check the conductors and insulating
materials for corrosion and damage.
Measure the insulation resistance.
Check and change the relay.
7.1.3

Daily and periodic inspection

Area of Inspection
inspection item
Surrounding
environment
Overall unit
General
Power supply
voltage
228
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.1 Inspection item
Tighten them according to the specified tightening torque. (Refer to
Description
Check the surrounding air temperature, humidity,
dirt, corrosive gas, oil mist, etc.
Check for unusual vibration and noise.
Check for dirt, oil, and other foreign material.
Check that the main circuit voltage and control
*2
circuit voltage are normal.
Inspection interval Corrective action at
*3
fault occurrence
Daily Periodic
Improve the
○
environment.
Check fault location
○
and retighten.
*1
○ Clean.
Inspect the power
○
supply.
page 32.)
Check by
user