Daily Inspection; Periodic Inspection - Mitsubishi 900 Series User Manual

7.2 Daily Inspection

Daily inspection items are as follows.
Number Inspection Item
1 Module mounting status
Loose termi-
nal screws
Proximate
Connection
2 solderless ter-
status
minals
Loose con-
nectors

7.3 Periodic Inspection

Inspection items to be checked once or twice in six months or one year are as follows.
The following inspection should also be performed when equipment has been moved or modified or the wir-
ing changed.
Number Inspection Item
Ambient tem-
perature
Surrounding
1
environment
Ambient
humidity
Atmosphere
2 Power supply voltage check
Looseness
Mounting sta-
3
Dirt, foreign
tus
matter
Loose termi-
nal screws
Proximate
Connection
4 solderless ter-
status
minals
Loose con-
nectors
Inspection Method
Check for loose mounting
screws and disconnected Securely mounted
cover
Retighten screws with screw-
Not loose
driver
Visual check Proper intervals
Visual check Not loose
Inspection Method
Display sec-
tion
Make measurement with ther-
Other portions
mometer or hygrometer
Measure corrosive gas
10 to 90%RH
No corrosive gas
24VDC
Measure voltage across termi- 20.4DC to 26.4V
nals
Move module Should be mounted firmly
Visual check No dirt, foreign matter sticking
Retighten screws with screw-
Not loose
driver
Visual check Proper intervals
Visual check Not loose
Criterion
Retighten screws
Retighten terminal screws
Correct
Retighten connector fixing
screws
Criterion
0 to 40
For use in enclosure, tempera-
0 to 55
ture inside enclosure is ambi-
ent temperature
Change supply power
Retighten screws
Remove, clean
Retighten terminal screws
Correct
Retighten connector fixing
screws
7.2 Daily Inspection
1
Action
2
3
4
Action
5
6
7
8
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