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Daily And Periodic Inspection - Mitsubishi Electric 800 Series Hardware Instruction Manual

Separated converter type.
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5.1.3

Daily and periodic inspection

Area of
Inspection item
inspection
Surrounding
environment
Overall unit
General
Power supply
voltage
General
Conductors and
cables
Transformer/
Main circuit
reactor
Terminal block
Smoothing
aluminum
electrolytic
capacitor
Relay/contactor
Operation check
Control
circuit,
Overall
protective
circuit
Aluminum
electrolytic
capacitor
Cooling fan
Cooling
system
Heat sink
Indication
Display
Meter/counter
Load motor 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 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.
Description
Check the surrounding air temperature, humidity,
dirt, corrosive gas, oil mist, etc.
Check for unusual vibration and noise.
Check for dirt, oil, and other foreign material.
Check that the main circuit voltage and control
*2
circuit voltage are normal.
• Check with megger (between main circuit
terminals and earth (ground) terminal).
• Check for loose screws and bolts.
• Check for overheat traces on the parts.
• Check for stains.
• Check conductors for distortion.
• Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.).
Check for unusual odor and abnormal increase of
whining sound.
Check for a damage.
• Check for liquid leakage.
• Check for safety valve projection and bulge.
• Visual check
Check that the operation is normal and no
chattering sound is heard.
• Check for an output voltage imbalance between
phases while operating the inverter alone.
• Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
• Check for unusual odor and discoloration.
• Check for serious rust development.
• Check for liquid leakage in a capacitor and
deformation trace.
• Visual check and judge by the life check of the
control circuit capacitor. (Refer to the FR-A800
Instruction Manual (Detailed)).
• Check for unusual vibration and noise.
• Check for loose screws and bolts.
• Check for stains.
• Check for clogging.
• Check for stains.
• Check that indications are correct.
• Check for stains.
Check that readouts are correct.
Check for vibration and abnormal increase in
operation noise.
Inspection
Corrective action at fault
interval
*3
Daily Periodic
Improve the environment.
Check fault location and
retighten.
*1
Clean.
Inspect the power supply.
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.
5. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Check
occurrence
by user
105
5.1 Inspection item
1
2
3
4
5
6
7
8
9
10

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