User`s manual

Troubleshooting Troubleshooting
11 – 14
11.2.14 When the LEDs of the output module do not turn on
The output module LED has not
turned on
refer to section 11.2.3
Reexamine the program
Output module hardware fault.
Please consult your local Mitsubishi
service center or representative,
explaining a detailed description of
the problem.
Is the MODE LED on?
Does the LED turn on when
another output module is forci-
bly turned on?
YES
NO
(Flickering)
YES
Is the LED on when the
output module is monitored on
GX (IEC) Developer?
NO
YES
Check the input/output number on the
GX (IEC) Developer system monitor
Does the output number
match?
Change the output number
NO
YES
NO
YES
NO
CPU module, base unit, extension
cable hardware fault.
Please consult your local Mitsubishi
service center or representative,
explaining a detailed description of
the problem.
Does the LED turn on
when the output module is changed
for another output module, which
is then forcibly
turned on?