163
Inspection item
6.1.3
Daily and periodic inspection
*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.
Consult us for periodic inspection.
Are
a of
Insp
ecti
on
Inspection Item
Description
Interval
Corrective Action at
Alarm Occurrence
Cus
tom
er'
s
Che
ck
Daily
Periodic
*2
General
Surrounding
environment
Check the surrounding air temperature, humidity,
dirt, corrosive gas, oil mist , etc.
{
Improve emvironment
Overall unit
Check for unusual vibration and noise.
{
Check alarm location and
retighten
Power supply
voltage
Check that the main circuit voltages and control
voltages are normal.
*1
{
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 in
whining sound.
{
Stop the device and contact
the manufacturer.
Terminal block
Check for 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 and judge by the life check of the
main circuit capacitor.
(Refer to page 164)
{
Relay/contactor
Check that the operation is normal and no chatter
is heard.
{
Contact the manufacturer
Resistor
(1) Check for crack in resistor insulation.
{
Contact the manufacturer
(2) Check for a break in the cable.
{
Contact the manufacturer
Control
circuit
protective
circuit
Operation check
(1) Check that the output voltages across phases
with the inverter operated alone is balanced.
{
Contact the manufacturer
(2) Check that no fault is found in protective and
display circuits in a sequence protective
operation test.
{
Contact the manufacturer
Part
s 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 trance.
{
Contact the manufacturer
(2) Visual check and judge by the life check of the
control circuit capacitor.
(Refer to page 164.)
{
Cooling
system
Cooling fan
(1) Check for unusual vibration and noise.
{
Replace the 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.
Load
motor
Operation check
Check for vibration and abnormal increase in
operation noise.
{
Stop the device and contact
the manufacturer.
Summary of Contents for FR-A741-11K
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