Chapter 11. MAINTENACE
11 - 2
11.3 Periodic Inspection
Check the following items once or twice every six months, and perform the needed corrective actions.
Check Items
Checking Methods
Judgment
Corrective Actions
temperature
0 to 55
°
C
Ambient
humidity
5 to 95% RH
Ambient
environment
Ambience
Measure with thermometer
and hygrometer Measure
corrosive gas
There should be no corrosive
gases
Looseness,
play
Move the unit
The module should be
mounted securely
PLC
conditions
Ingress of
dust or
foreign
material
Visual check
No dust or foreign material
Retighten screws
Loose
terminal
screws
Re-tighten
Screws should not be loose
Retighten
Distance
between
terminals
Visual check
Proper clearance
Correct
Connecting
conditions
Loose
connector
Visual check
Connectors should not be
loose
Retighten connector
mounting screws
Line voltage check
Measure voltage across
110/ 220 VAC terminal
85 ~ 264VAC (GM6-PAFA/B))
10.5 ~ 28VDC (GM6-PDFA)
20 ~ 28VDC (GM6-PD3A)
Change supply power
Battery
Check battery replacement
time and battery capacity
reduction
•
Check total power failure
time and the specified source
life
•
Battery capacity reduction
should not be indicated
If battery capacity
reduction is not
indicated, Change the
battery when specified
service life is exceeded
Fuse
Visual check
No melting disconnection
If fuse melting
disconnection, change
the fuse periodically
because a surge current
can cause heat