User`s manual

Troubleshooting Troubleshooting
11 – 10
11.2.5 When the POWER LED is flickering in orange
When the POWER LED of the Life detection power supply module Q61P-D flickers in orange at
power-on or during operation of the programmable controller, power on the programmable con-
troller again.
● If the POWER LED is flickering again, the corresponding power supply module is faulty and
must be replaced.
● If the POWER LED is on in green after powering on, there is no error.
● If the POWER LED is off after powering on, refer to the flowchart for when the POWER LED
turned off in section 11.2.4.
11.2.6 When the POWER LED has turned on in red
● When the POWER LED of the redundant power supply module has turned on in red at
power-on or during operation of the programmable controller, remove the corresponding
redundant power supply module, and mount it onto the normal redundant base unit. (At this
time, do not mount any modules other than the redundant power supply module.)
If the POWER LED of the redundant power supply module is off or on in red, the
corresponding redundant power supply module is faulty. (Replace it with a normal one.)
● If the POWER LED of the redundant power supply module is on in green, return the
corresponding redundant power supply module to the original system, and remove all
modules other than the redundant power supply module from the redundant base unit.
If the POWER LED of the redundant power supply module is off, the redundant base unit
that includes the corresponding redundant power supply module is faulty. (Replace it with
a normal redundant base unit.)
● If the POWER LED of the redundant power supply module is on in green (when returned to
the original system), check the sum of internal current consumptions of the modules that
comprise the system.
– If the total current exceeds the rated output current of the power supply module,
reexamine the system configuration to make the total current less than the rated current
consumption of one redundant power supply module.
– If the total current does not exceed the rated output current of the power supply module,
a hardware fault may have occurred in one of the modules. Execute operation checks in
due order, starting with the minimum system. For the module that does not operate,
please consult your local Mitsubishi service center or representative, explaining a
detailed description of the problem.
11.2.7 When the LIFE LED has turned off or turned on in red/is flickering in red
When the LIFE LED of the Life detection power supply module Q61P-D turned off or turned on
in red/is flickering in red at power-on or during operation of the programmable controller, refer to
section 7.2.3 for possible causes.