Periodic Inspection - Mitsubishi Q2ACPU User Manual

21. MAINTENANCE AND INSPECTION

21.2 Periodic Inspection

Inspection on items shown below should be conducted once or twice every six months to a
year. Conduct the inspection when the equipment is moved or modified, or wiring is
changed.
Item
1
2
3
4
5
6
Check item
Ambient temperature
Measure with
temperature and
Ambient humidity
humidity gauge.
Measure presence of
Atmosphere
corrosive gases.
100/200VAC,
24VDC, 110VDC
Line voltage check
Measure voltage across
100/200VAC terminals.
Check if the fuse is
Fuse
blown.
Test by moving the
Loosening, backlash
module.
Adhesion of dirt or
Visual inspection
foreign matters
Loosening of Retighten with a
terminal screw screwdriver.
Proximity of
Visual inspection
solderless terminals
Loosening of
Visual inspection
connector
Confirm SM51 or SM52
is OFF with a peripheral
Battery
device in the monitoring
mode.
Table 21.2 Periodic inspection
Check method Judgement
0 to 55
10 to 90%RH
There is no corrosive
gas present.
85 to 132VAC
170 to 264VAC
15.6 to 31.2VDC
85 to 140VDC
(Preventive
maintenance)
Must be installed solidly.
No adhesion.
No loosening.
There is an appropriate
distance.
No loosening.
(Preventive
maintenance)
21 - 2
Action
When used in a panel,
temperature inside the
panel is the ambient
temperature.
Change the power
supply.
Even if a fuse has not
blown, the element may
have deteriorated due to
inrush current, and the
fuse should therefore be
changed at regular
intervals.
Retighten the screw.
For CPU module, I/O
module, and power
supply modules check
all connections.
Remove and clean.
Retighten.
Correct the distance.
Retighten the connector
fixing screw.
Even when there is no
low-battery display,
replace if specified life is
exceeded.