Daily And Periodic Inspection - Mitsubishi Electric FR-A820-00046 Instruction Manual

Inspection item
NOTE When using the safety stop function, periodic inspection is required to confirm that safety func-
tion of the safety system operates correctly.
For more details, refer to the Safety Stop Function Instruction Manual.
7.1.3

Daily and periodic inspection

Area of in-
Inspection item
spection
Surrounding
environment
Overall unit
General
Power supply
voltage
General
Conductors, cables
Transformer/reactor
Main
circuit
Terminal block
Smoothing
aluminum
electrolytic capacitor
Relay/contactor
Resistor
Tab. 7-1: Daily and periodic inspection (1)
7 - 2
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 voltages and control
voltages are normal.
(1) Check with megger (across main circuit
terminals and earth (ground) terminal).
(2) Check for loose screws and bolts.
(3) Check for overheat traces on the parts.
(4) Check for stain.
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.).
Check for unusual odor and abnormal increase of
whining sound.
Check for a damage.
(1) Check for liquid leakage.
(2) Check for safety valve projection and bulge.
(3) Visual check and judge by the life check of the
main circuit capacitor. (Refer to page 7-6.)
Check that the operation is normal and no
chattering sound is heard.
(1) Check for crack in resistor insulation.
(2) Check for a break in the cable.
Precautions for maintenance and inspection
Inspection
interval
Corrective action at
fault occurrence
Improve the
environment.
Check fault location and
retighten.
Clean.
Inspect the power
supply.
Contact the
manufacturer.
Retighten.
Contact the
manufacturer.
Clean.
Contact the
manufacturer.
Contact the
manufacturer.
Stop the equipment and
contact the
manufacturer.
Stop the equipment and
contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Check by
the user