Mitsubishi Electric FR-A862-E Instruction Manual page 74

5.1.3
Daily and periodic inspection
Area of
Inspection item
inspection
Surrounding
environment
General Overall unit
Power supply
voltage
General
Conductors, cables
Transformer/
Main circuit
reactor
Terminal block
Smoothing
aluminum
electrolytic
capacitor
Relay/contactor
Operation check
Control
circuit,
Overall
protective
circuit
Aluminum
electrolytic
capacitor
Cooling fan
Cooling
system
Heat sink
Indication
Display
Meter/counter
Load motor Operation check

Oil component of the heat dissipation grease used inside the inverter may leak out. The oil component, however, is not flammable, corrosive, nor
conductive and is not harmful to humans. Wipe off such oil component.

It is recommended to install a voltage monitoring device for checking the voltage of the power supplied to the inverter.

One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
Consult us for periodic inspection.
NOTE
• Continuous use of a leaked, deformed, or degraded smoothing aluminum electrolytic capacitor (as shown in the table above)
may lead to a burst, breakage or fire. Replace such capacitor without delay.
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) Judge by visual check
Check that the operation is normal and no
chattering sound is heard.
(1) Check that the output voltages across phases
are balanced while operating the inverter alone.
(2) Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
(1) Check for unusual odor and discoloration.
(2) Check for serious rust development.
(1) Check for liquid leakage in a capacitor and
deformation trace.
(2) Visual check and judge by the life check of the
control circuit capacitor. (Refer to the Instruction
Manual (Detailed) of the FR-A860.)
(1) Check for unusual vibration and noise.
(2) Check for loose screws and bolts.
(3) Check for stain.
(1) Check for clogging.
(2) Check for stain.
(1) Check that indications are correct.
(2) Check for stain.
Check that readouts are correct.
Check for vibration and abnormal increase in
operation noise.
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Inspection
interval Corrective action at
fault occurrence
Periodic
Daily

 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.
Stop the equipment and

contact the manufacturer.
Contact the manufacturer.

 Contact the manufacturer.

Replace the fan.

Fix with the fan cover

fixing screws
 Clean.
 Clean.
 Clean.
 Contact the manufacturer.
 Clean.
Stop the equipment and

contact the manufacturer.
Stop the equipment and

contact the manufacturer.
Inspection item
Check
by the
user
5
73