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5.1.3
Daily and periodic inspection list
Area of
Inspection Item
Inspection
Surrounding
environment
General
Overall unit
Power supply
voltage
General
Conductors,
cables
Transistor /
Main Circuit
Reactor
Terminal block
Smoothing
aluminum
electrolytic
capacitor
Relay / Contactor
Operation check
Control
Circuit
Overall
Protective
Parts
circuit
check
Aluminum
electrolytic
capacitor
Cooling fan
Cooling
system
Heatsink
Air filter, etc.
Indication
Display
Meter
It is recommended to install a device to monitor voltage for checking the power supply voltage to the converter.
One to two years of periodic inspection cycle is recommended. However, it differs according to the installation environment.
Consult us for periodic inspection.
NOTE
Continuous use of a leaked, deformed, or degraded smoothing aluminum electrolytic capacitor (as shown in the table
above) may lead to a burst, breakage, or fire. Replace such capacitor without delay.
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
circuit voltage are normal.
(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 unusual odor and abnormal increase
of whining sound.
Check for a damage.
(1) Check for liquid leakage.
(2) Check for safety valve projection and bulge.
(3) Visual check
Check that the operation is normal and no
chatter is heard.
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
(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 for clogging.
(2) Check for stain.
(1) Check that display is normal.
(2) Check for stain.
Check that reading is normal.
Inspection items
Interval
Corrective Action at
Periodic
Daily
Alarm Occurrence
Improve the environment.
Check alarm location and
retighten.
Clean
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.
Stop the device and
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 cooling fan.
Retighten.
Clean.
Clean.
Clean.
Clean or replace.
Clean or replace.
Contact the manufacturer.
Clean.
Stop the device and
contact the manufacturer.
Customer's
Check
5
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