Power Led Of Redundant Power Supply Module Is Lit Red; When Mode Led Of The C Controller Module Is Not Lit; C Controller Module Err.led Is Lit Or Flashing - Mitsubishi Electric MELSEC Q Series User Manual

23.1.3

POWER LED of Redundant Power Supply Module is lit red

Check the following items.
POWER LED is lit green when the pertinent power supply
module is replaced and the power is turned on again.
POWER LED is not lit when the power supply is turned on
again with all modules other than the power supply
module disconnected.
The internal current consumption for the entire system
exceeds the rated output current of the power supply
module.
Remark
For the procedure to replace the redundant power supply module during operations of the C Controller system, refer to the
following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
23.1.4

When MODE LED of the C Controller module is not lit

Check the following items.
ERR.LED is flashing.
The module is started up in the hardware diagnostics
mode.
If the MODE LED does not light after checking the items and performing the corresponding actions described above, the
hardware may be faulty. Please consult your local Mitsubishi service center or representative, explaining the details of the
problem.
23.1.5

C Controller module ERR.LED is lit or flashing

An error has occurred.
For error details, check the event history and error code in [Diagnostics]  [CCPU diagnostics] in Setting/monitoring
tools for the C Controller module.
Check item
Event history
Error code
Check item
Check item
Check if multiple errors have occurred at the same time.
Take actions according to the error code.
If multiple error have occurred at the same time, take actions against the first error.
For error codes, refer to the following.
Page 409, Appendix 1
CHAPTER 23 TROUBLESHOOTING
Corrective action
The power supply module has failed.
Replace the power supply module.
The Redundant power supply base unithas failed.
Replace the edundant power supply base unit
Reexamine the system configuration so that the internal
current consumption does not exceed the rated output
current.
Corrective action
System watchdog timer error has occurred.
Take actions against occurrence of any system watchdog
timer error (CPU Error code : 5000).
(Page 409, Appendix 1)
Power OFF the module to terminate the hardware
diagnostics mode and power-on the module again.
Corrective action
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