Mitsubishi Electric AJ65BTS-RPH User Manual page 45

(2) The RUN LED is not lit while the module power is ON.
If the RUN LED is not lit while the module power is ON, turn off and on
the module again.
If the RUN LED is not lit after the module power is reapplied, the
hardware may be faulty. Please contact your local Mitsubishi
representative.
(3) The ERR. LED lights up or blinks.
Troubleshooting is shown below for the case that the ERR. LED lights up
or blinks.
The ERR. LED lights up or blinks.
Is the transmission rate of
AJ65BTS-RPH set in the valid range?
(Refer to Section 4.3)
YES
Is the connection of the
communication cable and terminating resistor
correct? (Refer to Section 4.4)
YES
Is there any noise source
around the AJ65BTS-RPH or
communication cable?
YES
Refer to (4) and (5) in this chapter
to perform troubleshooting.
NO
Correct the transmission rate setting
of AJ65BTS-RPH. (Refer to Section 4.3)
NO
Connect the communication cable and
terminating resistor correctly.
(Refer to Section 4.4)
NO
Move the noise source away from the
AJ65BTS-RPH and communication
cable to a place not influenced by noise.
Completion
35