How To Check The 7-Segment Led Diagnostics - Mitsubishi Electric Q12DCCPU-V User Manual

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TROUBLESHOOTING
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- 83 16.5 Hardware Self-Diagnostic Function
16.5.1 Hardware self-diagnostic test and initialization setting of the Q12DCCPU-V
(c) How to check the 7-segment LED diagnostics
To diagnose the 7-segment LED, repeatedly move the RESET/SELECT switch to
the SELECT position.
The indication of the 7-segment LED changes from No.1) to 8) as shown below by
every move of the switch.
1)
2)
3)
4)
5)
6)
7)
8)
Visually check that the segments of the 7-segment LED changes in the proper
order.
If any of them does not lit, hardware fault of the C Controller module may be the
cause.
Please consult your local Mitsubishi representative, explaining the details of the
problem.