8.2  Regular Inspections
8-3
Maintenance and Inspection
8.2  Regular Inspections
This section explains inspection items that must be performed once or twice every six months to one year. 
Inspections must also be performed when the equipment is relocated or modified or when the wiring is changed.
 Do not replace the built-in fuse.
If the customer replaces the built-in fuse, the MP2300S may malfunction or break down.
Contact your Yaskawa representative.
No. Inspection Item Inspection Details Criteria Action
1
Operating 
Environment
Ambient Temperature
Check the temperature and 
humidity with a thermometer 
and hygrometer, respectively.
Check for corrosive gases.
0°C to 55°C
If the MP2300S is used 
inside a panel, treat the tem-
perature inside the panel as 
the ambient temperature.
Ambient Humidity
30% to 95% RH
Atmosphere
There must be no corrosive 
gases.
2
Power 
Supply 
Voltage 
Check
PS Module
Measure the voltage between 
24-VDC terminals.
19.2 to 28.8 VDC
Change the power supply as 
necessary.
3
Installation 
Conditions
Looseness and 
Excess Play
Attempt to move the Module.
The Module must be secured 
properly.
Retighten the screws.
Dust and Other For-
eign Matter
Visually check.
The Module must be free 
from dust and other foreign 
matter.
Clean.
4
Connection 
Conditions
Check the Terminal 
Screws for Looseness.
Check by retightening the 
screws.
The screws must be tight. Retighten.
Gap between Crimp 
Te rminal s
Visually check.
There must be an appropriate 
gap between the terminals
Correct.
Looseness of 
Connectors
Visually check. The screws must be tight.
Retighten the connector set 
screws.
5
Battery
Check the BAT indicator on 
the front panel of the Basic 
Module.
The BAT indicator must be 
not lit.
If the BAT indicator is lit, 
replace the battery.