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Daily And Periodic Inspection - Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual

Fr-e700 series.
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6.1.3

Daily and periodic inspection

Area of
Inspection Item
Inspection
Surrounding
environment
General
Overall unit
Power supply voltage
General
Conductors, cables
Main circuit
Terminal block
Smoothing aluminum
electrolytic capacitor
Relay
Operation check
Control
circuit,
Protective
Overall
circuit
Aluminum
electrolytic
capacitor
Cooling fan
Cooling
system
Heatsink
Indication
Display
Meter
Load motor
Operation check
∗1
It is recommended to install a device to monitor voltage for checking the power supply voltage to the inverter.
∗2
One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
For a periodic inspection, contact your sales representative.
Description
Check the surrounding air temperature,
humidity, dirt, corrosive gas, oil mist, etc.
Check for unusual vibration and noise.
Check that the main circuit voltages are
normal.∗1
(1) Check with megger (across main circuit
terminals and earth (ground) terminal).
(2) Check for loose screws and bolts.
(3) Check for overheat traces on the parts.
(4) Check for stain
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.)
Check for damage.
(1) Check for liquid leakage.
(2) Check for safety valve projection and
bulge.
(3) Visual check and judge by the life check
of the main circuit capacitor (Refer to
page 314)
Check that the operation is normal and no
chatter is heard.
(1) Check that the output voltages across
phases with the inverter operated alone is
balanced
(2) Check that no fault is found in protective
and display circuits in a sequence
protective operation test.
(1) Check for unusual odor and
discoloration.
(2) Check for serious rust development
(1) Check for liquid leakage in a capacitor
and deformation trace
(2) Visual check and judge by the life check
of the main circuit capacitor (Refer to
page 314)
(1) Check for unusual vibration and noise.
(2) Check for loose screws and bolts
(3) Check for stain
(1) Check for clogging
(2) Check for stain
(1) Check that display is normal.
(2) Check for stain
Check that reading is normal
Check for vibration and abnormal increase
in operation noise
Inspection items
Interval
Corrective Action at
Periodic
Daily
Alarm Occurrence
∗2
Improve environment
Check alarm location and
retighten
Inspect the power supply
Contact the manufacturer
Retighten
Contact the manufacturer
Clean
Contact the manufacturer
Contact the manufacturer
Stop the device and
contact the manufacturer.
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Contact the manufacturer
Stop the device 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 device and
contact the manufacturer.
Stop the device and
contact the manufacturer.
Customer's
Check
6
313

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