Mitsubishi Electric Melsec A Series - Periodic Inspection

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
oto 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