Inspection item
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
147
5
5.1.3
Daily and periodic inspection list
∗1
It is recommended to install a voltage monitoring device for checking the voltage of the power supplied to the converter.
∗2
One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
Consult us for periodic inspection.
∗3
Oil component of the heat dissipation grease used inside the converter may leak out. The oil component, however, is not flammable, corrosive,
nor conductive and is not harmful to humans. Wipe off such oil component.
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.
Area of
inspection
Inspection item
Description
Inspection
interval
Corrective action at
fault occurrence
Check by
user
Daily
Periodic
General
Surrounding
environment
Check the surrounding air temperature, humidity, dirt,
corrosive gas, oil mist, etc.
Improve the environment.
Overall unit
Check for unusual vibration and noise.
Check fault location and
retighten.
Check for dirt, oil, and other foreign material.
Clean.
Power supply voltage
Check that the main circuit voltage and control circuit
voltage are normal.
Inspect the power supply.
Main
circuit
General
(1) Check with megger (between main circuit terminals
and earth (ground) terminal).
Contact the manufacturer.
(2) Check for loose screws and bolts.
Retighten.
(3) Check for overheat traces on the parts.
Contact the manufacturer.
(4) Check for stains.
Clean.
Conductors and
cables
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.).
Contact the manufacturer.
Contact the manufacturer.
Transformer/
Reactor
Check for unusual odor and abnormal increase of
whining sound.
Stop the equipment and
contact the manufacturer.
Terminal block
Check for a damage.
Stop the equipment and
contact the manufacturer.
Smoothing aluminum
electrolytic
capacitor
(1) Check for liquid leakage.
Contact the manufacturer.
(2) Check for safety valve projection and bulge.
Contact the manufacturer.
(3) Visual check
Relay/contactor
Check that the operation is normal and no chattering
sound is heard.
Contact the manufacturer.
Control
circuit,
protective
circuit
Operation check
Check that no fault is found in protective and display
circuits in a sequence protective operation test.
Contact the manufacturer.
C
omponents ch
eck
Overall
(1) Check for unusual odor and discoloration.
Stop the equipment and
contact the manufacturer.
(2) Check for serious rust development.
Contact the manufacturer.
Aluminum
electrolytic
capacitor
(1) Check for liquid leakage in a capacitor and
deformation trace.
Contact the manufacturer.
(2) Visual check
Cooling
system
Cooling fan
(1) Check for unusual vibration and noise.
Replace the fan.
(2) Check for loose screws and bolts.
Retighten.
(3) Check for stains.
Clean.
Heatsink
(1) Check for clogging.
Clean.
(2) Check for stains.
Clean.
Display
Indication
(1) Check that indications are correct.
Contact the manufacturer.
(2) Check for stains.
Clean.
Meter/counter
Check that readouts are correct.
Stop the equipment and
contact the manufacturer.
Summary of Contents for FR-XC-11K
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