139
Inspection items
5
5.1.3
Daily and periodic inspection list
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.
Area of
Inspection
Inspection Item
Description
Interval
Corrective Action at
Alarm Occurrence
Customer's
Check
Daily
Periodic
General
Surrounding
environment
Check the surrounding air temperature,
humidity, dirt, corrosive gas, oil mist, etc.
Improve the environment.
Overall unit
Check for unusual vibration and noise.
Check alarm location and
retighten.
Check for dirt, oil, and other foreign material.
Clean
Power supply
voltage
Check that the main circuit voltage and control
circuit voltage are normal.
Inspect the power supply.
Main Circuit
General
(1) Check with megger (across main circuit
terminals and earth (ground) terminal).
Contact the manufacturer.
(2) Check for loose screws and bolts.
Retighten.
(3) Check for overheat traces on the parts.
Contact the manufacturer.
(4) Check for stain.
Clean.
Conductors,
cables
(1) Check conductors for distortion.
(2) Check cable sheaths for breakage and
deterioration (crack, discoloration, etc.).
Contact the manufacturer.
Contact the manufacturer.
Transistor /
Reactor
Check for unusual odor and abnormal increase
of whining sound.
Stop the device and
contact the manufacturer.
Terminal block
Check for a damage.
Stop the device and
contact the manufacturer.
Smoothing
aluminum
electrolytic
capacitor
(1) Check for liquid leakage.
Contact the manufacturer.
(2) Check for safety valve projection and bulge.
Contact the manufacturer.
(3) Visual check
Relay / Contactor
Check that the operation is normal and no
chatter is heard.
Contact the manufacturer.
Control
Circuit
Protective
circuit
Operation check
Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
Contact the manufacturer.
Parts
check
Overall
(1) Check for unusual odor and discoloration.
Stop the device and
contact the manufacturer.
(2) Check for serious rust development.
Contact the manufacturer.
Aluminum
electrolytic
capacitor
(1) Check for liquid leakage in a capacitor and
deformation trace.
Contact the manufacturer.
(2) Visual check
Cooling
system
Cooling fan
(1) Check for unusual vibration and noise.
Replace the cooling fan.
(2) Check for loose screws and bolts.
Retighten.
(3) Check for stain.
Clean.
Heatsink
(1) Check for clogging.
Clean.
(2) Check for stain.
Clean.
Air filter, etc.
(1) Check for clogging.
Clean or replace.
(2) Check for stain.
Clean or replace.
Display
Indication
(1) Check that display is normal.
Contact the manufacturer.
(2) Check for stain.
Clean.
Meter
Check that reading is normal.
Stop the device and
contact the manufacturer.
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.
HC2.book 139 ページ ２０１２年１１月１９日 月曜日 午前１０時５２分
