Mitsubishi Electric FR-F800 Series Instruction Manual page 624

7.1.3
Area of
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
Protection
circuit
Control
circuit
Cooling fan
Cooling
system
Heat sink
Indication
Display
Meter/counter
Operation
Load motor
check
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Daily and periodic inspection
Inspection
item
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 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 and judge by the life check of the main
circuit capacitor. (Refer to
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.
Overall
• Check for serious rust development.
• Check for liquid leakage in a capacitor and
Aluminum
deformation trace.
electrolytic
• Visual check and judge by the life check of the control
capacitor
circuit capacitor. (Refer to
• 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.
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Description
*1
*2
page 626.)
page 626.)
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Inspection
Corrective action
interval
at fault
*3
occurrence
Daily Periodic
Improve the
○
environment.
Check fault location
○
and retighten.
○ 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.
7.1 Inspection item
1
Check
by user
2
3
4
5
6
7
8
9
10
623