Mitsubishi Q172CPU User Manual page 185

6 INSPECTION AND MAINTENANCE
(d) Flowchart for when "ERR." LED is turned on/flickered.
The following shows the flowchart to be followed when the "ERR." LED is
turned on/flickered at the power supply ON or operation start or during
operation.
Explain the error symptom and get
advice from our sales representative.
"ERR." LED is turned on/flickered.
H/W error
Confirm error contents for self CPU by
PC diagnostics of the GX Developer.
Refer to the help of the GX Developer
and correct error contents.
H/W error
Confirm error contents by GSV P
error history.
Refer to the help of the GSV P
and correct error contents.
Reset by the RESET/L.CLR switch.
Set the RUN/STOP switch to RUN.
6 - 18
Is the"ERR." LED
turned off?
YES
Completion
NO