Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual page 99

Check code
6831, 6834
(E3/E5)
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards
Continued from the previous page.
Refer to the chapter "Electrical
Work".
Is the wiring connected properly,
meeting the condition?
Yes
OCH673D
MA communication receive error
Diagnosis
No
Connect the wiring properly as specified in
the chapter "Electrical Work" in the indoor
unit Installation Manual.
No abnormality
It might be caused by an external noise, so
check the transmission line to remove the
factor(s).
99
Chart 2 of 2
Remedy