If The Run Led Has Flickered Or Turned Off; If The Err. Led Has Turned On Or Flickered - Mitsubishi Q Series User Manual

8 TROUBLESHOOTING

8.3 If the RUN LED Has Flickered or Turned Off

8.4 If the ERR. LED Has Turned On or Flickered

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Check item
Is 5VDC supplied?
Is the sum of current capacities of the modules
loaded on the base unit equal to or less than
the current capacity of the power supply
module?
Has a watchdog timer error occurred?
Is a module change enabled during an online
module change?
(1) If turned on
Check item
Is cold junction temperature compensation
resistance disconnected?
(2) If flickered
Check item
Has a write data error occurred?
Corrective action
• Check the power supply module.
• Load the module securely.
Make the sum of current capacities of the
modules loaded on the base unit equal to or
less than the current capacity of the power
supply module.
• Reset the programmable controller CPU or
power it on again.
• Change the Q62HLC.
Refer to Chapter 7 and handle it.
Corrective action
• Connect cold junction temperature
compensation resistance.
• Q62HLC hardware fault.
Please consult your sales representative.
Corrective action
• Check the error code list in Section 8.1 and
correct the sequence program.
MELSEC-Q
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