Additional NX Unit Power Supply Unit
UNIT PWR indica-
tor
Cause Correction
Green
Lit The Unit power supply is supplied. --- (This is the normal status.)
Not Lit The Unit power supply is not sup-
plied.
Check the following items and supply the Unit
power supply correctly.
[Check Items for Power Supply]
• Make sure that the power supply cable is
wired correctly
.
• Make sure that the power supply cable is not
disconnected.
• Make sure that the power supply voltage is
within the specified range.
• Make sure that the power supply has enough
capacity.
• Make sure that power supply has not failed.
Additional I/O Power Supply Unit
I/O PWR indicator
Cause Correction
Green
Lit The I/O power is supplied. --- (This is the normal status.)
Not Lit The I/O power is not supplied. Check the following items and supply the I/O
power supply correctly
.
[Check Items for Power Supply]
• Make sure that the power supply cable is
wired correctly
.
• Make sure that the power supply cable is not
disconnected.
• Make sure that the power supply voltage is
within the specified range.
• Make sure that the power supply has enough
capacity.
• Make sure that power supply has not failed.
5 Troubleshooting
5-4
NX-series System Units User's Manual (W523)