Mitsubishi Electric Q173CPU User Manual page 186

6 INSPECTION AND MAINTENANCE
(e) Flowchart for when "M.RUN" LED is turned off.
The following shows the flowchart when the "M.RUN" LED is turned off
during operation.
"M.RUN" LED is turned off.
Is "ERR." LED
turned on/flickered?
NO
Is the RESET/L.CLR
switch of the CPU module in
the neutral position?
Neutral position
Is M2000 turned on?
ON
H/W error
Explain the error symptom and get
advice from our sales representative .
REMARK
(Note-1) : When the RUN/STOP switch is stop position and the RESET/L.CLR is
tilted to L.CLR several times for latch clear operation, the "M.RUN" LED
flashes to indicate that the latch clear processing is under operation.
When the RESET/L.CLR switch is further tilted to L.CLR while the
"M.RUN" LED flickers, "M.RUN" LED turned off and terminates the latch
clear processing.
YES
(d)
"Flowchart for when "ERR." LED
is turned on/flickered."
RESET position
Set the RESET/L.CLR switch to
the neutral position.
When started the latch clear,
(Note-1)
"M.RUN" LED is flickered.
NO
OFF
NO
6 - 19
Is "M.RUN" LED
turned on?
M2000 is turned on.
Is "M.RUN" LED
turned on?
Completion
YES
YES