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Mitsubishi Electric FR-CS84-012 Instruction Manual Page 230

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Area of
Inspection
inspection
item
• Check with megger (between main circuit
• Check for loose screws and bolts.
General
• Check for overheat traces on the parts.
• Check for stains.
• Check conductors for distortion.
Conductors and
cables
• Check cable sheaths for breakage and
Transformer/
Check for unusual odor and abnormal increase of
reactor
whining sound.
Main circuit
Terminal block
Check for a damage.
Smoothing
• Check for liquid leakage.
aluminum
electrolytic
• Check for safety valve projection and bulge.
capacitor
Check that the operation is normal and no
Relay/contactor
chattering sound is heard.
• Check for cracks in the resistor insulator.
Resistor
• Check for a break in the cable.
• Check for an output voltage imbalance between
Operation
• Check that no fault is found in protective and
check
Control
circuit
• Check for unusual odor and discoloration.
Protective
Overall
circuit
• Check for serious rust development.
Aluminum
• Check for liquid leakage in a capacitor and
electrolytic
capacitor
Cooling fan
• Check for stains.
Cooling
• Check for clogging.
system
Heatsink
• Check for stains.
• Check that display is normal.
Display
• Check for stains.
Display
Meter
Check that reading is normal.
Load
Operation
Check for vibration and abnormal increase in
Motor
check
operation noise.
*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 to check the voltage of the power supplied to the inverter.
*3
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
terminals and earth (ground) terminal).
deterioration (crack, discoloration, etc.).
phases while operating the inverter alone.
display circuits in a sequence protective
operation test.
deformation trace.
Inspection interval Corrective action at
*3
fault occurrence
Daily
Periodic
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.
Contact the
manufacturer.
Contact the
manufacturer.
Stop the equipment
and contact the
manufacturer.
Contact the
manufacturer.
Contact the
manufacturer.
Clean.
Clean.
Clean.
Contact the
manufacturer.
Clean.
Stop the equipment
and contact the
manufacturer.
Stop the equipment
and contact the
manufacturer.
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Check by
user
2
2
3
4
5
6
7
8
9
10
229
7.1 Inspection item

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