Mitsubishi Electric FR-CC2-N Series, Инструкция по эксплуатации

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7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.1 Inspection item
1
2
3
4
5
6
7
8
9
10
*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.
Main circuit
General
• Check with megger (between main circuit terminals
and earth (ground) terminal).
○
Contact the
manufacturer.
• Check for loose screws and bolts. ○ Retighten.
• Check for overheat traces on the parts. ○
Contact the
manufacturer.
• Check for stains. ○ Clean.
Conductors and
cables
• Check conductors for distortion. ○
Contact the
manufacturer.
• Check cable sheaths for breakage and deterioration
(crack, discoloration, etc.).
○
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
• Check for liquid leakage. ○
Contact the
manufacturer.
• Check for safety valve projection and bulge. ○
Contact the
manufacturer.
• Visual check. ○
Relay/contactor
Check that the operation is normal and no chattering
sound is heard.
○
Contact the
manufacturer.
Control
circuit,
protection
circuit
Operation
check
• Check for an output voltage imbalance between
phases while operating the inverter alone.
○
Contact the
manufacturer.
• Check that no fault is found in protective and display
circuits in a sequence protective operation test.
○
Contact the
manufacturer.
Co
mponents che
ck
Overall
• Check for unusual odor and discoloration. ○
Stop the
equipment and
contact the
manufacturer.
• Check for serious rust development. ○
Contact the
manufacturer.
Aluminum
electrolytic
capacitor
• Check for liquid leakage in a capacitor and
deformation trace.
○
Contact the
manufacturer.
• Visual check. ○
Cooling
system
Cooling fan
• Check for unusual vibration and noise. ○ Replace the fan.
• Check for loose screws and bolts. ○
Fix with the fan
cover fixing
screws.
• Check for stains. ○ Clean.
Heat sink
• Check for clogging. ○ Clean.
• Check for stains. ○ Clean.
Display
Indication
• Check that indications are correct. ○
Contact the
manufacturer.
• Check for stains. ○ Clean.
Meter/counter Check that readouts are correct. ○
Stop the
equipment and
contact the
manufacturer.
Load motor
Operation
check Check for vibration and abnormal increase in operation
noise.
○
Stop the
equipment and
contact the
manufacturer.
Area of
inspection
Inspection
item
Description
Inspection
interval
Corrective action
at fault
occurrence
Check by
user
Daily Periodic
*3