Mitsubishi Electric FATEC FR-A800 Manual page 53

4
PREVENTIVE MAINTENANCE
Inspection
Inspection item
area
Operation check
Overall
Aluminum
electrolytic
Capacitor
Cooling fan
Heat sink
Indication
Meter
Operation check
1 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.
2 It is recommended to install a voltage monitoring device for checking the power supply voltage to the inverter.
3 One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
For periodic inspection, consult the nearest Mitsubishi FA Center.
Remark
4.2 Maintenance and inspection
48
Daily and periodic inspection
Description
(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 diagnosis of the control
circuit capacitor.
(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 display is normal.
(2) Check for stain.
Check that reading is normal.
Check for vibration and abnormal
increase in operation noise.
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.
Inspection
Corrective action at fault
interval
Periodic
occurrence
Daily

 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.
Customer's
check