Scheduled Inspections - Mitsubishi Electric A173UHCPU User Manual

5. INSPECTION AND MAINTENANCE

5.3 Scheduled Inspections

No. Item
Ambient
temperature
Ambient
Ambient
1
environment
humidity
Atmosphere
2 Supply voltage
Looseness
3 Installation
Dirt, foreign
matter
Loose terminal
screws
Spacing
between
4 Connections
solderless
terminals
Loose
connectors
5 Battery
The inspections listed in the table below should be conducted once or twice every
6 to 12 months. They should also be conducted after equipment is moved or
upgraded, and if the wiring is changed.
Table 5.3 Scheduled Inspections
Description
Measure temperature and
humidity.
Measure corrosive gases.
Measure voltage across 100
VAC/200 VAC terminals.
Move units and check
Visual
Turn with a screwdriver
Visual
Visual
In monitor mode, check from
peripheral device that M9006
and M9007 are OFF.
Evaluation Standard
0 C to 55 C
10% to 90% RH
No corrosive gases
85 VAC to 264 VAC
Firmly installed
No dirt or foreign matter
No loose screws
Correct spacing is maintained
Connectors fully tightened
(Preventative maintenance)
5 − 4
Remedy
If system is in an
enclosure,
measure
temperature and
humidity inside the
enclosure.
Change power
supply
Tighten screws.
Clean
Tighten loose
screws
Adjust spacing
Tighten connector
screws
Replace battery if
life is exceeded,
even if no voltage
drop occurs.
Refer to Section
5.3.1.