Hitachi S10VE, User Manual

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12. Inspection
12-2
12.2 Periodic check items
To keep the S10VE system in optimal condition, we recommend that you conduct routine or periodic
inspections. A periodic inspection should occur at least twice a year.
Table 12-2 lists the items to be checked as part of a periodic inspection.
Table 12-2 Check items
No. Item
(1) External appearance of modules
(2) Information presented by indicators and other display devices
(3)
Tightness of mounting screws, terminal block screws, and connector
fittings and fixtures
(4) Condition of cable and wire sheaths
(5) Presence of dust or dirt
(6) Fluid leakage from inside the power supply module
(7)
Power supply voltage (of power supply module and miscellaneous
external power sources)
(1) External appearance of modules
Inspect the module housings for cracks or splits. A problem with the housing might be a sign of damage to the
internal circuitry and a potential cause of system malfunction.
(2) Information presented by indicators and other display devices
Inspect the indicator and other display devices for information about abnormalities in the system.
(3) Tightness of mounting screws, terminal block screws, and connector fittings and fixtures
Turn off the power supply of the system before performing this inspection.
Make sure that no screws have come loose. This includes module fixing screws, terminal block screws, and
cable connector fittings.
Tighten any loose screws you find. Loose screws can cause the system to malfunction or result in burn damage
due to heating.
(4) Condition of cable and wire sheaths
Inspect the cable and wire sheaths for abnormalities or signs of heat. If a sheath has separated from its cable or
become unusually hot, this can cause the system to malfunction, or pose a risk of electric shock or burn injury
from a short circuit.
(5) Presence of dust or dirt
Inspect the modules for dust or dirt. Turn off all power supplies, and use a vacuum cleaner to remove dust from
the module housings to prevent it from building up on surfaces. Dust buildup can cause a short circuit in the
internal circuitry, potentially causing burn damage to the equipment.