Inspection item
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
99
5
5.1.3
Daily and periodic inspection
∗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.
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.
Area of
inspection
Inspection item
Description
Inspection
interval
Corrective action at
fault occurrence
Check
by the
user
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 fault location and
retighten.
Check for dirt, oil, and other foreign material.
Clean.
Power supply
voltage
Check that the main circuit voltages and control
voltages 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.
Transformer/
reactor
Check for unusual odor and abnormal increase of
whining sound.
Stop the equipment and
contact the manufacturer.
Terminal block
Check for a damage.
Stop the equipment 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) Judge by visual check
Relay/contactor
Check that the operation is normal and no
chattering sound is heard.
Contact the manufacturer.
Control
circuit,
protective
circuit
Operation check
(1) Check that the output voltages across phases
are balanced while operating the inverter alone.
Contact the manufacturer.
(2) Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
Contact the manufacturer.
Component
s check
Overall
(1) Check for unusual odor and discoloration.
Stop the equipment 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 and judge by the life check of the
control circuit capacitor. (Refer to the FR-A800
Instruction Manual (Detailed)).
Cooling
system
Cooling fan
(1) Check for unusual vibration and noise.
Replace the fan.
(2) Check for loose screws and bolts.
Fix with the fan cover
fixing screws
(3) Check for stain.
Clean.
Heat sink
(1) Check for clogging.
Clean.
(2) Check for stain.
Clean.
Display
Indication
(1) Check that indications are correct.
Contact the manufacturer.
(2) Check for stain.
Clean.
Meter/counter
Check that readouts are correct.
Stop the equipment and
contact the manufacturer.
Load
motor
Operation check
Check for vibration and abnormal increase in
operation noise.
Stop the equipment and
contact the manufacturer.
Summary of Contents for FR-A842-07700
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