Periodic Inspection - LG MASTER-K 120S Series User Manual

Chapter 10 Maintenance

10.3 Periodic Inspection

Check the following items once or twice every six months, and perform the needed corrective actions.
Check Items
Ambient
temperature
Ambient
Ambient Humidity
Environment
Ambience
Looseness, Ingress
PLC
Conditions
dust or foreign
material
Loose terminal
screws
Distance between
Connecting
terminals
conditions
Loose connectors
Line voltage check
Fuse
Checking Methods
-. Measure with thermometer and
hygrometer
-. measure corrosive gas
The module should be move
the unit
Visual check
Re-tighten screws
Visual check
Visual check
Measure voltage between input
terminals
Visual check
Judgment
0 ~ 55 °C
5 ~ 95%RH
There should be no
corrosive gases
The module should be
mounted securely.
No dust or foreign material
Screws should not be loose
Proper clearance
Connectors should not be
loose.
*85 ~ 264V AC
*20~28V DC
No melting disconnection
10-2
Corrective Actions
Adjust to general standard
(Internal environmental standard of
control section)
Retighten screws
Retighten
Correct
Retighten connector mounting
screws
Change supply power
If fuse melting disconnection,
change the fuse periodically
because a surge current can cause
heat