Notes On Maintenance And Inspection; Daily Inspection; Cleaning; Periodic Inspection - Hitachi SJ Series User Manual

Chapter 19
19.2 Notes on Maintenance and
Inspection
19.2.1

Daily Inspection

As a basic procedure, check that the following
abnormalities are not observed during operation.
No. Description
1 The motor operates according to the
settings
2 There is no abnormality in the
environment where the device is
installed.
3 There is no abnormality in the cooling
system.
4 No abnormal vibration or sound is
observed.
5 No abnormal overheat or discoloration is
observed.
6 No abnormal smell is observed.
While the inverter is running, check the input voltage
of inverter using a tester, etc.
No. Description
1 There is no frequent occurrence of
variation of power supply voltage.
2 Line voltage keeps a good balance.
19.2.2

Cleaning

Make sure to always keep the inverter clean for
operation.
No. Description
1 For cleaning, lightly wipe off dirt with a
soft cloth dampened with neutral
detergent.
2 Solvents such as acetone, benzene,
toluene, and alcohol may cause the
inverter surface to dissolve or its coating
to peel off, therefore, do not use them.
3 Do not clean the display section
including the operator keypad using a
detergent or alcohol.
19.2.3

Periodic Inspection

Check sections that cannot be inspected unless
operation is stopped and sections requiring periodic
inspection.
Please contact us for periodic inspection.
Check

No. Description

1 There is no abnormality in the cooling
system.
・Cleaning of the air filter and other

components
2 Checking tightness and re-tightening

・Due to effects of vibration or
temperature change, tightened

portions of screws or bolts may loosen.
Make sure to carefully check and
 perform the work.
3 No corrosion or damage is observed on
the conductors and insulators.
4 Measurement of insulation resistance
5 Checking and replacing the cooling fan,
smoothing capacitor, and relay
Check


Check

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19-2
Maintenance and Inspection
Check
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