Chapter 6 Inspection And Maintenance - Hitachi SH1 Series Basic Manual

Chapter 6
Chapter 6
Inspection and maintenance
Read this before performing any
inspection or maintenance!
There is risk of electric shock!
・Before an inspection the supply power must to be
cut off, and then wait at least 10 minutes(*1) or
15 minutes(*2) before proceeding.
(Make sure that the charge lamp in the inverter is
off. Furthermore, measure the voltage between
the P and N terminals and make sure that the
voltage is less than 45V)
*1) For models SH1-00041-H～00620-H (SH1-007H～
SH1-220H)
*2) For models SH1-00770-H～SH1-03160-H
(SH1-300H～SH1-1320H)
6.1 Inspection and maintenance notes
6.1.1 Daily inspection
Check and confirm for the following abnormalities while
the inverter is operating:
No. Details
1 Motor operates as per settings
2 No abnormalities in the environment
3 Cooling-system running normally
4 Abnormal vibration or noise
5 Discolouration and superheating
6 Unusual odour
While operating, check the inverter input voltage using a
multimeter or a similar tool to confirm:
No. Details
1 Voltage supply fluctuation
2 Line-to-line voltage balance
Inspection and maintenance
・Other than the designated person, do not perform any
maintenance, inspection or component replacement.
(Before starting to operate, remove any wristwatch or
metal accessories such as bracelets, and use always
isolated tools)
6.1.2 Cleaning
Keep the inverter in a clean condition.
No. Details
1 When cleaning the inverter, use a soft
cloth soaked in neutral detergent to gently
wipe up the dirtied parts.
✓
2 Do not use solvents like acetone, benzene,
toluene or alcohol to clean the inverter, as
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it can melt its surface or peel off the
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coating.
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3 For the display of the panel do not use
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detergent or alcohol to clean it.
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6.1.3 Periodic inspection
Check the parts that are only accessible while the inverter
is stopped. The periodic inspection is a vital point that has
to be carried out, for any periodic inspection, please
✓
contact your Hitachi distributor.
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No. Details
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1 Check for abnormalities in cooling system
・Heat sink cleaning, etc.
2 Check the fastening and tighten
・By the effects of oscillations, thermal
expansion, etc..., the screws and bolts
may become loose, proceed to tighten
after confirming.
3 Check that there is no damage or
corrosion to the conductors and insulators
4 Measurement of the dielectric breakdown
voltage of insulators
5 Check and replacement of cooling-fan,
smoothing capacitator and relay.
6-1
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