Hitachi SJ Series, User Manual

Page: 644 / 786

19-2
Chapter 19
Maintenance and Inspection
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 Check
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 Check
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 Check
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.
No. Description Check
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
