Mitsubishi Electric FR-CC2-N Series Instruction Manual page 156

Area of Inspection
inspection item
• Check with megger (between main circuit terminals
• 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 deterioration
Transformer/ Check for unusual odor and abnormal increase of
Main circuit
reactor whining sound.
Terminal block Check for a damage.
• Check for liquid leakage.
Smoothing
aluminum
electrolytic • Check for safety valve projection and bulge.
capacitor
• Visual check.
Check that the operation is normal and no chattering
Relay/contactor
sound is heard.
• Check for an output voltage imbalance between
Operation
check
• Check that no fault is found in protective and display
Control
• Check for unusual odor and discoloration.
circuit,
protection Overall
circuit
• Check for serious rust development.
• Check for liquid leakage in a capacitor and
Aluminum
electrolytic
capacitor
• Visual check.
• Check for unusual vibration and noise.
Cooling fan • Check for loose screws and bolts.
Cooling
system
• Check for stains.
• Check for clogging.
Heat sink
• Check for stains.
• Check that indications are correct.
Indication
• Check for stains.
Display
Meter/counter Check that readouts are correct.
Operation Check for vibration and abnormal increase in operation
Load motor
check noise.
*1 Oil component of the heat dissipation grease used inside the converter unit 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 voltage of the power supplied to the converter unit.
*3 One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
Consult us for periodic inspection.
Description
and earth (ground) terminal).
(crack, discoloration, etc.).
phases while operating the inverter alone.
circuits in a sequence protective operation test.
deformation trace.
Inspection
interval
*3
Daily Periodic
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Corrective action
Check by
at fault
user
occurrence
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.
155
7.1 Inspection item
1
2
3
4
5
6
7
8
9
10