11 TROUBLESHOOTING
11.2.4 Flowchart for when the "POWER" LED is turned off
The following shows the flowchart to be followed when the "POWER" LED of the power supply module turns off at PLC
"POWER" LED is turned off.
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| NO |
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Is there a power supply? |
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| Supply power. |
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| YES |
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| NO |
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| YES | |||||
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| Can "POWER" LED | ||||||||
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| be turned on? |
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Is the power |
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supply voltage within the | NO |
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| The supply voltage should be within |
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voltage range given in the |
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| the rated range. |
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specifications? |
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| YES |
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| NO | Can "POWER" LED | YES | ||||||
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| NO |
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| be turned on? |
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Is the power supply |
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| Properly fix the power supply module. |
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module fixed? |
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| YES |
| NO |
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| YES | ||||
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| be turned on? |
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| 1) Check the |
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Is overcurrent | YES |
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| and reduce the amount of overcurrent. |
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protection and overvoltage |
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protection working? |
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| 2) Turn OFF the input power and wait |
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| several minutes before turning it ON |
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again.
NO
Please consult your local Mitsubishi service center or representative, explaining a detailed description of the problem.
NO | Can "POWER" LED | YES | |
| be turned on? |
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Completion
11 - 5 | 11 - 5 |