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Precautions for maintenance and 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.
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
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
Check for liquid leakage in a
capacitor and deformation trance
{
Contact the
manufacturer
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.
Area of
Inspection
Inspection
Item
Inspection Item
Interval
Corrective
Action at Alarm
Occurrence
Customer's
Check
Daily
Periodic
*2