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Periodic Inspection - Mitsubishi Electric MELSEC-A Series User Manual

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8. MAINTENANCE AND INSPECTION
- - - - - - - - - - - - - - - - - - - - MELSEC-A
I
8.2
Periodic Inspection
This section explains the inspection items which are to be checked every six
months to one year. If the equipment have been moved or modified or wiring
has been changed. also make the inspection.
Table 8.2 Periodic Inspection
Number
Check Item
Checking Method
Judgement
Corrective Action
Ambient
o
to 55°C
temperature
Measure with
When PC Is used
Ambient
Ambient
thermometer and
inside a panel, the
1
hygrometer.
101090'*' RH
temperature in the
environment
humidity
Measure corrosive
panel Is ambient
gas.
There should be
temperature.
Ambience
no eorrosive
gases.
Measure voltage
8510132 VAC
Change supply
2
Line voltage check
across
100/2000
power. Change
VAC
terminal.
17010264 VAC
transformer tap.
There should be
Condition
Ingress of dust
not dust or
3
of each
or foreign
Visual check.
foreign material,
Remove and clean.
module
material
in the vicinity of
Ihe P.C.
Loose terminal
Connectors
Retighten.
should not be
Retighten.
screws
loose.
Distances
Proper clearance
Connecting
between
should be
4
Visual check.
provided
Correct.
conditions
solderless
terminals.
between solder-
less terminals.
Loose
Connector should
Retighten
connector
Visual check.
not be loose.
connector mounting
screws.
Check battery
If bettery capecity
status by monitor-
reduction Is not
5
Battery
ing special auxiliary
Preventive
indicated, change
relays M9006 and
maintenance
Ihe battery when
MOO07.
Replace
specified service life
battery if necessary.
is exceeded.
8-2

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