Toshiba T2N - Manual (Page 93)

6.Troubleshooting
78 PROSEC T2N
The following is a flow-chart of checks for use when the POWER LED does not
light even when the power to the T2N is switched ON, or when a power supply
failure occurs after some specified time.
Is the supplied power
voltage within the specified
values? Outside the
specified values
85~264Vac,
20.4~28.8Vdc,
Has the power
supply fuse blown?
Note: After eliminating
the cause of the
blown fuse, replace it.
See the following
NOTE. Blown
Not blown
Will the POWER LED light
when all the modules and
the expansion cables other
than the power supply
module are removed?
Out The problem lies in the
power supply module or
the rack.
Lit
Re-check whether the
internal 5V and external
24V current consumption is
within the allowable values. Outside the
allowed range.
Within the
allowable values.
Mount the modules one
by one, and determine
the state where the
POWER LED goes out.
The module mounted
immediately before the
light goes out is defective.
Make to total current
consumption of the
CPU and I/O come
within the allowable range.
Within the
allowable values.
6.2
Power Supply Check
1.When carrying out the above checks, always check each step after
switching the power supply OFF again.
2.When a fuse has blown, always determine the cause of the blown fuse
and eliminate it. If the fuse is replaced and the power supply is switched
ON again without eliminating the cause, there is a risk of progressive
damage to the module.
When the cause of the blown fuse cannot be determined, consult
Toshiba without replacing the fuse.
NOTE