Mitsubishi Electric Q06HCPU - When the LIFE LED Does Not Turn on in Green or Orange

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CHAPTER 15 TROUBLESHOOTING
15
15.1 Visual Inspection 15.1.3 When the LIFE LED does not turn on in green or orange
15.1.3 When the LIFE LED does not turn on in green or orange
Check the following items according to the LIFE LED status.
(1) When the LIFE LED is off
Resupply power to the system. If the LIFE LED turns on in red for one second, replace the power supply module
as the power supply module has reached its end of life.
If the LIFE LED does not turn on or flicker after resupplying power, the power supply module should be replaced
as the life diagnosis is impossible.
(2) When the LIFE LED turns on in red
(3) When the LIFE LED flickers in red
Supply power to the system again. If the LIFE LED does not turn on in green or orange even after the power is
supplied, check the wiring between LG and FG by referring to the following.
• Grounding a programmable controller ( Page 116, Section 4.8.4)
• Wiring a power cable and a ground wire ( Page 654, Appendix 8.1.2 (2))
• Grounding a power supply part ( Page 662, Appendix 8.1.5)
If the symptom still remains after the check, replace the power supply module.
Check item Corrective action
The operating ambient temperature is out of the range of 0 to
55°C.
Keep the operating ambient temperature within the range of
0 to 55°C.
The LIFE LED turns on in red after power is resupplied.
Stop the operation of the power supply module for a while,
and resupply power to the system after the internal
temperature of the module is lowered.
If the LIFE LED does not turn on in green or orange after
resupplying power, replace the power supply module.